Yeah! What about this guy, his current school's website had this to say: The offensive-minded coach has served as an offensive coordinator at Memphis (1988-89), UTEP (1994-96), and SMU (1997). He has also coached at Texas A&M, Mississippi State, and LSU. Should be more offesnive firepower than we could ever imagine.
Just because a coach shows a tendency as a coach doesn't necessarily translate to how they will approach a head coaching job. As an OC, they don't have to worry about how long the defense has been on the field (for example). That is the difference between those coordinators who will always retain their coordinator mentality; and those coordinators that can transition to the responsibility of managing all three phases of the game.