The Vile Calibos!
Don't get me wrong, I'm not judging Calibos based on his unfortunate appearance. After all, that's a curse from Zeus and hardly his own fault at all. Neither am I judging his actions, which may not be excused but can certainly be understood when his situation is carefully considered. Certainly more misguided and slightly tragic than outright vile, one should think. But. He does live in an icky swamp.