I have to go with the old tandem of Brent Musberger and Ara Parseghian. There was something so informative and entertaining with these two and yet down to earth. There was that seriousness of a college football game battle taking place and it always felt like they were keeping you informed of what was happening on the field at every moment, with every play, it always seemed that as a viewer, you never missed a beat with these two.
Ara with his excellent knowledge of X's and 0's, (and it was top notch excellent), and experience being a player and a legendary coach (his time coaching Northwestern was very impressive). Ara had a way of letting the viewer in on what was really happening on the field and why, and he had a very down to earth way about him. With Brent and his extremely entertaining style that usually never missed a beat, they kept you informed and let you know there was a battle happening on that field, and it was in an engaging and entertaining way.