I'd consider Darth Bane, the Sith Lord who instituted the rule of two Sith - one master and one apprentice - to be the most morally complex villain of all time. read more
Dumas gives his protagonist plenty of justifications for revenge, to which even the most benevolent of readers can relate. read more
Villains are also some of the most complex creations in cinema, a hero's motivations are often very clear and have no subtext but with a good villain, their ambiguity and muddled intentions is what makes them so captivating. read more