my vote goes to Kefka...If you want to know why, you can just look at all of the posts I've made...okay, nevermind, how about I just tell you.
1. He is a pure madman
2. He could totally pwnzorz Sephy any day of the week
3. He is heartless
4. He succeeded in taking over the world, and in becoming godlike, where Sephy failed