Prof. Fleeber
I thought all the scenes with Fleeber were tremendously funny. I read once where the screenwriter must have used Fleeber's character to get revenge on the professors he had in film school. But any of us who have spent a lot of time in higher education can recognize the same (obnoxious, vain, superficial, cowardly, inconsiderate) traits in some professors we've had.
That whole scene in the classroom is especially clever.