WhiteFangofWar said:
This takes me back- my old common forum had this conversation every other day, usually with either Sephiroth or Kefka getting the most 'votes'.
Limited to Video Games, I'd jump on the Final Fantasy bandwagon and say Seymour Guado. Guy is powerful, cold as ice (fitting for his temple) and capable of backstabbing his way to the top authority of the Yevon Clergy Revolver Ocelot-style (who I also like) in spite of his mixed heritage. And this isn't enough- he wants to be GOD. So he can SAVE everyone. Indeed.
Wanting to be a god is pretty much the defining motivation for any Final Fantasy villain. It's all any of them want, with very little idea what they're going to do
next. (Kefka, basically, spends the rest of his short life burning ants with a magnifying glass like a bored yet sociopathic child, Seymour and Kuja want to become a god so they can kill everyone because they think the world sucks, Chaos, Sephiroth and Exdeath just wanted to be a god, and killing everyone was an unfortunate side effect). The only real differences are Emperor Palamecia (actually wanted to
rule the world, rather than destroy it), and Zemus and Garland (FFIX) because they were basically racial supremacists who wanted to kill the people on the world to replace them with their own.
I would say, though, that the truly "most" evil requires some kind of grand scale evil. And for that you have to go for Darth Malak in Knights of the Old Republic. By ordering the destruction of Taris, a city-planet with a population which a conservative estimate must put in the hundreds of billions, if not trillions, population wise, he commits an atrocity many orders of magnitude worse than almost any other villain in fiction even gets the opportunity to contemplate, and why does he do it? To kill
one person. Kills hundreds of billions to get
one. That's real evil. (Of course, this is in the finest traditions of Star Wars villainry, where it is considered appropriate to blow up an inhabited planet
just to make a point).