I do agree with you about how full of awesome sauce Jafar and Frollo are. And yes, Hellfire is one of the most ingenious songs ever created. Hence the honorable (and very honorably intended) mentions. It took me a long time to pick #5, I kept going back and forth. But Hades just stuck out in my head more because of how different he was as a villain. My brother and I used to play a mental drinking game every time Frollo made the glower face. We got hypothetically smashed. It’s great stuff, but it’s expected. Hades was fresh.

Maleficent and Ursula are definitely up there, and Scar is borderline for me, but I can’t believe that you left out two of my favorites: Jafar and Frolo.

Jafar is by far the slimiest villain (with the literal exception of Ursula of course), due to his lust for Jasmine, but that’s what we love about him. And his alter ego, the prisoner who helps Aladdin escape jail and find the cave of wonders, is great if only for his toothy, yellow smile. So maybe he can’t even defeat a street rat despite having power, sorcery, and finally phenomenal cosmic genie magic, but we don’t really want him to win and get Jasmine anyway.

And then there is Frolo. The best villain in the entire Disney canon! He can talk, he can sing, he can set fire to all of Paris, and all while maintaining that creepy, brooding look that sends shivers up our spine. But seriously, everyone knows that Hellfire is basically the greatest song that Disney ever wrote, both musically and for breaking all the rules on keeping sexual desire and religion out of the movies. Heck, the voice actor is so good that he had two lines in Beauty and the Beast and he got hired for another movie, just because of how evil his voice is!