Two things narrow the list down a bit in my mind.
One, I don't think we'll see Fred Glass taking any chances on moral "rehab projects" on his way out the door (and he'll be the guy signing off on this hire).
Two, Tom Allen just said this morning (in the video interview on this sites front page), that he planned to keep the Offensive system/concepts that we are currently running..., which narrows things down a bit...
With that in mind..., here's a name: Aaron Keen, the current OC up at Eastern Michigan...
He's beaten all three Big Ten teams that he's faced (all at their place) over the past 3 years... Granted those teams weren't world beaters but you have to remember that Eastern Michigan was scheduled by each of them to be a "sacrificial lamb" type of warm up game and they consistently (3-0) flipped the script (one of my personal favorites being their Win over the great Brohmardi , at the p u mud hole, in 2018)...
They also beat IL down at their place this year and Rutgers at their place back in 2017...
Keen just might be a diamond in the rough...
I mentioned him yesterday in another thread. IIRC his team/offense plays against Pitt in the Quick Lane Bowl on Dec. 26th.
Two more guys I mentioned in that thread will be in bowl games this Friday the 20th: Jim Zebrowski (Buffalo) and Mike Sanford (Utah State).