Seer Craft

The main point of this mod pack is to act as a vanilla enhancement mod pack with various quality-of-life improvements such as being able to make cacti grow with bonemeal (Universal Bone Meal) and make craftable tridants (Better Tridents), with various mods that have additional things to them that are new, but still keep the game fairly 'vanilla' such as adding new animals (Alex Mobs), updating fishing (Aquaculture), and adding backpacks (Sophisticated Backpacks). There are mods that change up the environment such as updating villages (Towns and Towers) and biomes (Oh The Biomes You'll Go). There are also cosmetic mods here such as furniture mods (Macaw's Furniture) and mods that add various items for the world (such as Supplementaries). 

The only mod in the pack which adds something beyond vanilla is the Twilight Forest, but this mod can be fully skipped out if someone is looking for just an updated vanilla experience.

Here is a pastebin link going over some of the mods with some tutorials on how to use them. None of the mods are that 'big' on their own, but it will go over the core components of them.