3. Bert Cooper
Ok, so what does Bert Cooper actually do? The answer to that is not a lot. With his interest in art and his fascination in Japanese culture there is no doubt that Cooper adds a bit of quirkiness to the office. He is one of the few people that knows Don's real story, showcased by his response when Campbell tired to blackmail Don - he just responds with 'Who cares'. With his lack an office for a period, Bert is was a familiar site in the SCDP lobby, once seen doing a crossword with Ida Blankenship in a coollection of sight gags that were just brilliant. Though Bert does not do a great deal in terms of the business he knows his mind and whenever he is around there is always something to make you smile.