There's evil and then there's unhinged. At least 19 of Disney's animated villains may actually be psychopaths.
Lady Tremaine - "Cinderella"
A calculating social climber with ugly daughters in a time where daughters meant a dowry, a financial strain even if the girl in question was beautiful? That sure sounds stressful, but taking it out on the one person who could actually hope to marry up is bad business.
Gaston - "Beauty & The Beast"
Nothing says sanity like planning an entire wedding to a woman who doesn't even like you. And only a person with a clean bill of health would bribe an asylum to lock up her father while you run off to murder her boyfriend because she turned you down.
Plummeting to his death barely covered his comeuppance.
Evil Queen - "Snow White"
Becoming the thing you fear most in order to murder someone who is no threat to you yet instead of taking them under your wing and molding them into a minion?
The queen is not the brightest tool in the shed.
Doctor Facilier - "The Princess & The Frog"
His evil was so evil, he had to import it from ANOTHER DIMENSION. That is some seriously bad juju.
Taking up with a devil and believing you'll come out ahead isn't a thing sane people think.