Sheep: requires ability to eat grass to gain hunger bars

Vex:flight illiagers passive

Skeleton: ability to ride spiders

Evoker: ability to summon fangs, vex and other Illagers passive

Rideable mobs: ability for players to ride you. If aquired Mob or (if possible) places a saddle on you

Donkey: like rideable mobs but the ability to have players to place chests.

Magma cube: any Mob that isn't fire resistant will take damage if you jump into them.