Mim is a deep cut I would expect someone like Yzma who would also be a similar nerdy pick. Gaston and Jafar are a little too mainstream. Frollo is very religious which I’m not sure Disney wants some one improving on that subject. For what it’s worth snuff out the light seemed to be played quite often last year.
Yzma would be fun, she could be critiquing fashion choices one moment, reciting her “first I’m going to turn him into a bug” monologue the next, and then cracking jokes. A true bonus would be having Kronk with her to play off each other (not sure that’s in the budget though.
I wouldn’t mind a face Queen of Hearts either (not the Burton one) that would also be fun. Mainly to replace an insane zany woman I want another insane zany woman.