Jigsaw

John Kramer didn't technically kill anyone — he designed elaborate mechanical traps that forced victims to mutilate themselves to survive. Tobin Bell's calm, grandfatherly delivery of lines like "I want to play a game" made Jigsaw the rare horror villain audiences partially agreed with. The Saw franchise grossed over $1 billion on combined budgets smaller than a single Marvel film. The dead-man-on-the-floor twist in the original remains one of the greatest reveals in horror history. He's the villain who made you do moral calculus.