Best villain in all time is Discord. For one, I love the actor who does his voice, it's so amazing and well done. The idea of a villain who is so funny, but is also great at causing trouble, is something I really like. A villain isn't just about power, it's also about character and comedy. My friend likes doing an impression of Joker from the Dark Knight and he says "My father says I have character." And every villain should have character, just like Discord.