Needful Things/YMMV

Non Sequitur Scene: As per Gaunt, "Oral sex gives me amnesia."
Complete Monster: Gaunt himself. He gets people to commit murder and kill themselves, as well as selling them goods that turn shoddy later on, and he is not shown to have any motive for this other than For the Evulz.
Moral Event Horizon: It is pretty much impossible to like Mr. Gaunt at all once eleven year old Brian Rusk kills himself and Gaunt takes note of it with pleasure.