10. Kevin Sussman: Then
As the proprietor of Stuart’s comic book store, Stuart Bloom played by Kevin Sussman is a regular character on the show. Audiences met Stuart in season two when he became the fifth wheel of their friendship-cart. Stuart is Raj’s substitute pal, at least when Howard is in space. Stuart is definitely not at the level of education of his cohorts, but he can draw and he has a special knowledge of the nerdy pursuit of comic books.