Prince John - Probably the most useless Disney villain ever, and I love him for it.
Hard pick, but I'll go with Hades -- he was certainly not the God of the Dead anyone was expecting.
Ursula has the best song, Maleficent the best design, and Dr. Facilier the best hat -- I'm voting Jaffar for having a little bit of all three.
Shere Khan, but mostly for his evil businessman TaleSpin version. Good ol' Tony Jay. ; -;
Yzma; her and Kronk make that movie.