Nightmare Fuel / Todd McFarlane's Spawn

• Violator's transformation (which depicts him as tearing through the body he has like it's paper) and Creepy Monotone arguably make him more terrifying here than in the comics.
• Some of the human villains also count. Namely, Billy Kincaid. Especially when he kidnaps Cyan. His dialogue and behavior when he's talking to her makes him sound like a child molester. Not helped by the eerie echo his voice has.....
  Billy Kincaid: Time to have that ice cream. Such a pretty one. Do you like the music? I like the music very much. Would you like to you dance? Just you and me. But first...I scream, you scream. We all scream for ice cream! Chocolate pecan, strawberry whirl! All...very good!
• Spawn himself is even more terrifying than he is in the comics. When he first shows up, he hovers in the air, his cape and chains resembling Combat Tentacles, and he proceeds to brutally dispatch the mobsters in the alleyway before letting the reporter go. But the reporter — soaked in gasoline — doesn't listen, and fires a gun at him, promptly and graphically catching on fire and burning to death.
• One episode has a serial killer who's picking off minorities, all while being apologetic to his victims, reassuring them that it's not their fault that they were born the way they were and he doesn't hold anything against them personally. And this is all before he lynches them and leaves them to join the rest of the rotting corpses in his lair.

---