Joker.

Cackle and Wither (Geronimo Stilton: Kingdom of Fantasy) and DarkStalker (Wings of Fire)

Marvel comics Carnage

Handsome Jack

Shao Khan

My fav is Vanny (in fnaf murderer rabbit)

I have a lot to name!

Destoroyah

Juzo Mido, Masayoshi Shido, and Yaldabaoth.

My favorite villain is Killian from Spies in disguise even ship him with my OC AKA Lance’s baby sister and Walter’s BFF! Sorry if I gave so much details!