Ultra Magnus
While sometimes coming off a bit, for lack of a better word, corny, Ultra Magnus was one of the coolest concepts of the Autobot family and the perfect second-in-command to Optimus. Magnus is a Mack Car Carrier and just gives off the air of his backup title. And since the movies upped the badassery of the Autobots a bit, it would be dope to see the usually buttoned-up Ultra Magnus would execute a mean streak.