Beasts of Tamriel

Adds dozens of new creatures and monsters to Skyrim. The mod's main goal, aside from adding a more diverse range of fauna to Skryim, is to also add as many creatures from ES lore as possible and give hunters a truly wide range of prey to fight and hunt. Also comes with an MCM menu to disable any creatures you don't want in your game. NOTE: Best to use this patch with it https://www.nexusmods.com/skyrimspecialedition/mods/18358

4thunkown

High Quality monster mods. (Note: You MUST download soupdragon1234 V2 fix for Kwama Creatures.)

Mihail Mods

While he STILL hasn't made a monster compilation mod, Mihail has up to 8 PAGES of mods on the Nexus. The level of quality also varies severely from mod to mod.

Creatures Of Falkreath

This mod adds Minotaurs, Ogres, Imps, Goblins and more to the world of Skyrim. These all use Beyond Skyrim assets so they fit into the world amazingly!

The Blood Horker (Bloodmoon Creature Restoration Project)

This mod adds the Blood Horker from Bloodmoon to Solstheim. It replaces all horkers on Solstheim and Horker Island with a unique skin and look.

Grahl - The Ice Troll

This mod restores the deadly Grahl to the island of Solstheim. Grahls were an important enemy in the Morrowind: Bloodmoon DLC, but for some reason they weren't included in Dragonborn. Until now.

Diverse Dragons Collection 2.0

This mod strives to create a dragon mod like no other seen before, drawing resources from 11 different mod authors and utilizing MCM scripts to create unmatched flexibility.

High Level Enemies

Adds 874 new enemies starting at level 10 to Skyrim. This is a decent mod to get if your planning to play at a really high level and you don't feel like turning on Legendary difficulty on. These enemies are mostly just re-names, but some have varying stats and perks to make each a little bit different. There are several different optional ESPs for DLC, level scaling, and hardcore difficulty if you always want the game to be difficult even with the best weapons and armor in the game.

Immersive Patrols

This mod adds some new NPC encounters to the game. They come in a wider variety such as roaming Imperial or Stormcloak soldiers, Thalmor agents, random travelers, and if you have the Dawnguard DLC you can get Dawnguard and Vampire patrols. Each group roams all across Skyrim and will attack enemies and anything that tries to harm them. It makes the roads a lot less empty now.

Dwemer Spectres

Adds in the ghostly dwemer you remember from Morrowind, in several varieties, as well as several boss versions. Conflicts with Immersive Creatures since IC integrated this mod, however IC's spectre bosses are pussies and if you want an actual challenge you should use this version.

Cliff Racers - Solstheim

Adds Cliff Racers to Solstheim.

Lucien - Immersive Fully Voiced Male Fol

Lucien is a fully voiced Imperial follower with over 5000 lines of immersive, lore-friendly dialogue. Though he arrives in Skyrim as a cowardly scholar, he'll gradually gain strength and confidence by your side until he grows into a hero in his own right.

Bears Mounts and Followers SE

Expands the Dovahbear meme to make him a follower AND a mount, ride the meme into the horizon!

Dwarven Luggage

A true pack mule mod. Dwarven Luggage adds dwarven spider chest that follows you around and helps hold a near limitless amount of weight within its interdimensional space. The Dwarven Luggage has a summon spell which allows you to call it to you along with all the gear you stashed on it, never loose your important gear again!

Inigo

Inigo is a custom follower with his own voice, his own quest, and his own AI and stats. He's a very interesting follower who is well worth a try. Unlike other followers with voices, his DOESN'T sound awful.

Slave Pack Riekling Porter

This mod adds a little funny Riekling Porter with an oversized Backpack ready to carry your weights after you do him a little favor...

The Erotic Adventures of Misty Skye

Download this. Seriously, I don't care if you're the purest motherfucker out there, this mod is funny as fuck. Adds a ton of content, quests a new dungeon and two companions that are hilarious.

Vilja in Skyrim

Meme follower noº1. Lots of people seem to like her tho.

Sofia

Meme follower noº2. Annoying as fuck.

Caesia

Unique, with her own quest and relationship system, the modder promises a bigger quest involving her, to which part 1 is released.

Arissa - The Wandering Rogue

Arissa is an Imperial with an independent, rebellious spirit and a gift for making expensive things disappear. She is a Skyrim companion character with over 600 lines of dialogue, professionally recorded and beautifully voiced by the talented Nikkita.

Simple Children

A simple overhaul for children, giving them unique faces, new skin, a wider variety of hair, and unique eye colors.

Kalilies NPCs

Changes the appearance of 72 female NPCs. Standalone. Meant to be used alongside Bijin and Pandorable overhauls.

Pride of Skyrim

A complete overhaul of over 300 different male NPCs. Some good and some... questionable. But regardless it's probably the biggest and, for the most part, best male overhaul mod we've seen.

True Meeko SE

A lot of options to change the best doggo in gaming.

RS Children

Makes the children in Skyrim not look like potatoes!

The Kids Are Alright SE

TKAA is different from RS Children in that it adds children of other races to the game, and even bandit kids, adding a lot more diversity to the game.

WICO - Windsong Immersive Chracter Overhaul

Way better than WSCO. Covers more, better textures, etc. Makes many male characters look amazing like my main man Tullius.

Total Character Makeover

If you dislike the huge incompatibility of WICO, this mod changes the characters faces slightly, but still keeps that vanilla feel.

Bijin NPCs

This mod will change the appearances of Vex, Sapphire, Irileth, Rikke, Hulda, Lisette, Carlotta, Karliah, Tonilia, Adrianne, Maven, Ingun, Gerdur and Idgrod the younger.

Bijin Wives

This mod will change the appearances of marriable characters(Camilla, Ysolda, Sylgja, Temba, Taarie, Muiri, Senna, Grelka and Morwen).

Bijin Warmaidens

This Mod changes the appearances of Lydia, Jordis, Iona, Aela, Mjoll, Uthgerd, Ria, Frea, Rayya, Njada, Annekke, Adelaisa, Jenassa, Illia, Delphine, Ingjard, Aranea, Eola, Borgakh, Brelyna, Beleval and Ugor.

Seranaholic

This Mod changes the appearance of Serana and her mother Valerica. P̶S̶S̶T̶,̶ ̶1̶.̶7̶ ̶i̶s̶ ̶t̶h̶e̶ ̶b̶e̶s̶t̶ ̶v̶e̶r̶s̶i̶o̶n̶.̶ Fuck no, 1.5 is the best.

Toccata as Elisif

Really, it's a follower but he provides an optional esp that uses his follower's appearance for Elisif. Which makes Elisif my Queenfu.

Pandorable's NPCs

Another good replacer for many named females in the game, also has a Dawnguard optional download.

The Ordinary Women

This mod changes the appearances of 60 NPCs, mostly forgotten ones and ones already done by Bijin. Put this in and then Load Bijin after if you want the best results in my opinion.

All Housecarl Replacer

This replaces the Housecarls appearances but it changes the men housecarls with female counterparts. So honestly, you'd only use it to replace the male housecarls with women.

CBBE SE

Pretty much the only Special Edition exclusive mod of importance right now, the new and improved CBBE has a bigger poly-count than UUNP, a new built-in "Special" body, with physics enabled tits, ass and vagene. Also new muscle sliders. No belly physics tho. ​BTW, for those that only use UUNP for Sevenbase, it also has built-in Sevenbase sliders, so you can recreate 7B Bombshell with it too. As an optional file, it also has HDT-SMP config, which adds collision for hands, feet and the new vagene

UUNP

"But Rav, CBBE is shit and I'm a shitter who doesn't even want to take a look at the new CBBE!" ​ Well, lucky you UUNP works on SE, just download Bodyslide from the Legendary Edition Nexus page and install it as normal, build your body of choice and be happy. ​ ...Until you realize you'll need to update every .esp, texture and meshes for every outfit mod you download from Legendary Edition. Good thing its easy to do, just follow the tutorial linked on the Essential SE page.

Better Males

Adds a permanently flaccid, or a permanent boner, reminder that if your erection lasts for longer than 4 hours, consult a doctor. Wait, there are no doctors in Skyrim? Uh... then go to the temple of Dibella or something.

SoS - Schlongs of Skyrim

Adds customizable dingdongs to the game, with an MCM menu to shape your 100% all-beef thermometer to your tastes. Want a big beefy muscular baby arm? Go for it. Want a slim, but very long giggle stick? Sure man, whatever floats your boat. Be sure to check the thread if you want to add physics and collision to your third leg.

Shape of Atlas (SAM) Light

The more customizable body available for men, with the optional downloads included on the mod page it adds BodyMorphs similar to those used on CBBE and UUNP to Racemenu. A lot of sliders to shape your dude however you want. Read the mod page and follow the instructions and you'll be fine.

CBPC physics is a simple implementation of breast, butt and belly physics, it is however very light, and does not present any of the known bugs that HDT do, like the occasional stretching. Now with collisions!

HDT-SMP

*DISCONTINUED* Hydrogensayshdt back at it again, with a working version of HDT-SMP for Special Edition. Hope you know chinese tho, as for now its only available on 9damao, where you'll need to create an account and post a comment on the page before you can download the files. It has been discontinued by Hydro, but the source files have apparently been released, here's hoping someone picks up the work.

HDT High heels

*DISCONTINUED* Also from hydrogensayshdt, which means its also in chinese. After you download it, the MCM menu may be a bunch of boxes, just donwload the translation files from the LE version on the mod and overwrite it.