There's always "Hal"---the hen-pecked husband from "Malcolm in the Middle". Although, any one of Steve Buscemi's character's would be good as he often plays paranoid, neurotic, crazy or sleazy people----often who try to come across tougher than they really are. There's Garland (Con Air), Rockhound (Armageddon), or one of my favs., Seymore (Ghostworld)----but there are many to choose from.