Hmm.. another 'comic book' villian (courtesy of my DC comic friend).. Dan Didio of DC
Oh, that is a good choice.
The wannabe Quesada (which is not good. No one should want to be like Quesada).
I would mention Black Adam.
Hero turned villain, turned anti-hero, turned king of his country, turned family father, turned widower, turned into stone.
He went through many different phases, and he was definitely one of my favorite "villains" during and after Geoff's JSA run.