Prep-Man
Also, rank them in intelligence, if you can.
http://media.comicvine.com/uploads/3/34475/978993-lex_large.gif
vs
http://media.comicvine.com/uploads/1/13657/296369-176669-dr-sivana_large.png
vs
http://media.comicvine.com/uploads/1/11352/561281-ultra1_large.jpg
http://media.comicvine.com/uploads/3/34475/978993-lex_large.gif
vs
http://media.comicvine.com/uploads/1/13657/296369-176669-dr-sivana_large.png
vs
http://media.comicvine.com/uploads/1/11352/561281-ultra1_large.jpg