John Doe (Se7en)

John Doe was a psychopathic serial-killer and chief antagonist of the movie Se7en - he was obsessed with the seven Deadly Sins of Christianity and killed his victims in symbolic murders representing each of them in an attempt (at least in his mind) to remind the world about the importance of avoiding such sins, his insanity was based on fanaticism and obsession but did little to damage his genius, in fact his madness may of added to it as he was a twisted mastermind who was comfortable with toying with the authorities and seemed to enjoy playing a game with them in a similiar fashion to killers such as Jack the Ripper - ultimately John Doe is killed by one of the offices chasing him. However John Doe's plan succeeded since via his masterful manipulation throughout the film his own death became a part of his masterplan, with the officer who killed him completing the final sin - that of Wrath.