6. John Ross Bowie: Then
First introduced in the second season of the show, Barry Kripke, played John Ross Bowie is the annoying co-worker. Kripke is a string theorist, a plasma physicist, and a particularly annoying but lovable character. Oh yeah, and Kripke has a particularly strong case of rhotacism, a speech impediment where he pronounces the letter “r” more like the letter “w,” like Elmer Fudd.