Candidates that I think ought to be on the table. None of these names are going to blow anyone's socks off, so they'll probably never happen. But they're what I'd be trying to do, if I was Herman and wanted to actually fix the problem instead of money-whipping a "known" name that was going to come in and perpetuate the problem.
Jon Heacock - Iowa State - has been really solid as DC at Iowa State, even with their talent problem. Runs a defense complimentary to Campbell's scheme, which is similar to Herman's scheme. Has experience frustrating air raid teams in the Big XII.
Jay Bateman - UNC - previously at Army. Has been a "though leader," to the extent that exists in football, regarding the defensive response to Air Raid football. Coached several years, successfully at Army under Monken, before getting hired by Mack at UNC this past offseason.'
Mike MacIntyre - has coached several good defenses. Could potentially by reunited with Jim Leavitt who, together, put together a couple of fantastic defenses at Colorado. It all fell apart after Leavitt left, but that potential combo is intriguing.
There are a few other guys worth hanging around the rim for, in case their schools decide to make a change this offseason:
Will Muschamp (I know, but seriously)
Pat Fitzgerald
Dave Doeren
Justin Wilcox
This is going to be a really unpopular comment, but he's a good defensive coach: Do you bring in someone like D.J. Durkin in an analyst role or potentially a position-coach role?