Modpack Wilderlands by Seltiair

This mod gives classic Minecraft a bigger and better world to enjoy. More biomes, better structure gen, more mobs (especially fish), more decor, and more simple utilities. 98% of this modpack looks right at home in vanilla, staying true to the base game while making it more lively with extra places to explore and many additional creatures to find.

World Gen:

Biomes o Plenty (adds many more amazing biomes with new woods types, flowers, and more)

Swampier Swamps (self explanatory)

YUNG's Better Mineshafts, Dungeons, and Nether Fortresses (revamps these structures to be more special, complex, and rewarding)

Mobs:

Alex's Mobs (adds a ton of cool animals from all around the world, all with unique interactions and many to tame and befriend - but also plenty to fear)

Fish of Thieves (adds fish from Sea of Thieves)

Aquaculture 2 (adds more fish that are unique to certain aquatic biomes, upgradable fishing equipment, and neptunium material type for better underwater exploration)

Vanilla Degus (adds degus, which can be tamed like wolves)

RevampedWolf (adds more wolf types and wolf armor)

Earth Mobs (adds a bunch of mobs from Minecraft Earth, like more zombie types and more farm animal varieties)

Forever a Child (feed a poisonous potato to any mob to stop it from aging, feed milk to undo)

Villager Names (automatically gives villagers names)

More Decor:

Handcrafted (adds a lot of furniture options to make your house a home)

Quality of Life:

Gravestones (a gravestone holding all your stuff spawns when you die, automatically reequips your stuff when you break the gravestone)

Explorer's Compass (allows to you find structures)

Waystones (waystones spawn throughout the world, which allow you to teleport to any other waystone you've found once activated)

Journey Map (adds a really nice minimap, which can be opened into a world map, where you can place any waypoints you want and teleport between them)

If you love vanilla but want more to explore, more animals to tame, more decorations for your house, and better ways to get around, this modpack should float your goat.