Yzma from The Emperor’s New Groove

The Grand High Witch from The Witches

Barty Crouch Jr. turned Draco Malfoy into a ferret.

The Joker from the Nolanverse

Dr. Hibbert from Treehouse of Horror XIII

Does Nina's dad from FMA count? Or is it different?

Amazing Spider-Man's Curt Connors tried to turn the New Yorkers into mutant lizards

Yzma forced Kuzco into a llama and Dr. Facilier turned Naveen and Tiana into frogs

The Coachman from Pinocchio turned young boys into donkeys.