I wrote some JSON with the following spawn weights for the biomes on the PriestCraft server:
Badlands:
Common: Vultures, bison
Uncommon: Hoglins, wolves
Rare: Snakes
Savanna:
Common: Rabbits, bison, hoglins
Uncommon: Wolves
Rare: Grizzly bears
Desert:
Common: Vultures
Uncommon: Snakes
Rare: Pillagers
Villages:
Common: Skeletons