A Craig
The biggest enemy of the Greg is the Craig. They're like night and day, but the Craig is louder, more obnoxious, and probably has a bigger ego.
Greg: I'm the best. Craig: I'm the best, and I'm not even trying.
Greg: I'm quiet and cool. Craig: I'm loud and obnoxious, and I'm not even trying.
Greg: I'm the best. Craig: I'm the best, and I'm not even trying.