A day late, but better late than never. Here is Day 4 of Villains' Night: The Pink Elephants from Dumbo.
Now one can argue if they are technically villains or not, but kinda like the Ringmaster, the Pink Elephants are the closest thing to an an antagonist in the film; so I'mma count it. XD Plus, I'm pretty sure this scared the piss out of everyone as a kid and it's labeled as nightmare fuel, and it's my list, so screw you, I'mma add it! XP