Welcome to the Asylum
who is the more terrifying monster?
Joker
Carnage
Mr. Zsasz
Dr. Destiny
Green Goblin
Dr Psycho-He's a rapist, a misogynist, a sadist and a mass murderer. He quite literally has no redeeming features and his only real motive in life is to make as many people suffer as possible. And it's implied he's been like this since he was a child, suggesting he really is just pure evil by nature.
Kevin Roark-a cannibal Serial Killer who acts as a hitman for Cardinal Roark when he's not killing and eating prostitutes
Roark Junior-a sadistic pedophile rapist and Serial Killer
Kid Miracleman
Willy Pete (Empowered)- a fire elemental. But he still has a man's appetites, and satisfies them with rape,cannibalism and killing, which, in his case, are one and the same, thanks to his constantly superheated body.
Hansel (Fables)-Jerk Ass who tortures and kills women for implied sexual gratification (starting with the witch that tried to eat them), up to and including his own sister
Mister Hyde- a sadistic bully and enemy of The Mighty Thor, Daredevil and The Incredible Hulk who systematically crippled the Avengers' butler Jarvis by breaking him apart one bone at a time
Psyko-an enemy of Sleepwalker who cut out the hearts of at least fourteen women as a Serial Killer before becoming fused with an otherworldly demon who gained the power to viciously Mind Rape his victims and make them Brainwashed and Crazy