Don't hate on Arthas Weezy, and btw Illidan very much is a villain. He goes insane after he's defeated by Arthas (in fact in his head he won the battle) and believes he has become an all powerful god, launching attacks at the Alliance and Horde. In WoW BC you kill him, and Maiev (who apparently didn't die) delivers the final blow. I don't actually play WoW anymore (quit more than a year ago) but I watched the video on youtube.
Arthas is certainly a villain among villains. What made him special was his transformation. I tend to prefer villains that go through a lot of changes (Kefka goes from being a clown and a lackey to a god, Kerrigan goes from psychic to demonic lieutenant of the Zerg, etc.). Arthas, in line with my 2 other favorite villains, goes from being a Paladin and doing what he thinks is right, to doing anything for power, and being corrupted by that power that he finally gains. The scope of his transformation is pretty huge. From Paladin to the Lich King himself, Arthas is truly something special among villains. Ranking my 3 favorites it would go:
Kefka
Arthas
Kerrigan
All 3 of them are great though and if you haven't played their games I highly recommend you do.












