Lex Luthor. Never mind the lame reason for his vendetta against Supes (gee, you're bald? Buy a wig, loser!) let's just revel in the fact that this supposed super genius never really twigged that coming directly at Superman was doomed to failure, as Supes was a God incarnate. I think I've seen three stories where Lex acts intelligently and actually plots a way to get Superman out of the way.