Sleepy SMP is a modpack featuring over 100 mods to make Minecraft better than vanilla but keep its vanilla feel. New biomes, structures, and creatures will be added, along with many quality-of-life improvements. Some of the main features this modpack brings are:

Iris Shaders It includes shader support for Minecraft, which allows great-looking graphics and lighting effects, enhancing the look and feel in game worlds.
Croptopia Adds a whole lot of new crops, trees, and food items that really expand farming and cooking beyond what's available in vanilla.
Yung's Better Mineshafts & Strongholds Regenerates underground structures for better exploration rewards and more challenges to the player.
Repurposed Structures Adds iterations of existing vanilla structures, including revamped villages and dungeons, for new exploratory gameplay.
BetterEnd & BetterNether The End and Nether dimensions have extra biomes, mobs, and resources added so players are more encouraged to explore these dimensions a little bit more.
Simple Voice Chat Proximity voice chat is added, increasing immersion for interacting with each other in multiplayer.
Lithium & Sodium Allows the game to perform better and run smoothly with more additions.

This modpack is ideal for players looking to add a little depth to Minecraft without losing that vanilla feel.

SleepySMP