8. Martin Mull as Gene Parmesan
Ahhh!!! Gene!!! Lucille Bluth Gene Parmesan is the first character on this list that has a significant presence in the new season, and that says something about the importance of the character. Even the parmesan cheese and mustard combination that G.O.B. and Tobias eat in Season 4 is a reference to Gene Parmesan (Martin Mull played Col. Mustard in Clue). While Michael thinks he is incompetent due to his not finding any evidence of George Sr.s cheating, Gene constantly manages to sneak up on Lucille, prompting the shocked response of Ahhh!!! Gene!!!