I readily admit that I am heavily biased positively toward D-II.
When I was a student at VSU, Hall Mumme was the head coach with Leach and Holgerson on staff. The Sigma Nu guys blasting an old air raid siren every time VSU scored is how the Air Raid got its name. Later, as previously mentioned, Smart and Muschamp were assistants at VSU.
In 2002, VSU made its first national championship game and lost to a team coached by Brian Kelly assisted by Chuck Martin.
The above is just a partial list. Obviously, not all of those coaches who get a chance pan out, but I also recall that Mike Yurcich was coaching at Shippensburg when Gundy hired him.