Paul "Bear" Bryant for Alabama.
Their are alot of them.
Danny Ford guided Clemson to its first and only national championship in 1981, and remains the youngest head coach in NCAA history to win a national title, accomplishing the feat at the age of 33.
That would be Nick Saban, who won a National Championship in 2003 with LSU and in 2009 with Alabama.
Ohio states coach
Lou Holtz is a retired American football coach and current college football analyst for ESPN. He won 249 games as a college head coach, which includes the national championship with Notre Dame in 1988. Holtz was also the head coach for the New York Jets in 1976.