Butch Davis is available. yes I know he is old but I guarantee him coaching anyone's defense would be better than any team Joe Lee Dunn Jr. has his stamp on.
I was just digging on Butch Davis. Here is what I found:
1. When he was the DC of the Dallas Cowboys back in 1993 and 1994 he coached the #2 and #3 scoring defenses in the NFL. So the guy was an elite NFL DC back in the day.
2. We know he could recruit and coach back when he was at Miami.
3. When he went back to the NFL at Cleveland, he was actually the last coach to take Cleveland to the playoffs until it was done in 2020. His defenses were ranked 15th, 10th, 12th, and 24th in scoring defense. So most of the time his defenses were in the top half of the league.
4. At North Carolina his defenses ranked 43rd, 32nd, 14th, and 45th. So he was pretty decent there as well.