I've said it in other threads but Nebraska is Iowa with a sh*tty record. Whomever is on Barta's current call list...that's who UNL can hope to get. I'll leave it to the resident Hawks and the board at large to throw out names. I'll say Jim Leonhard.
Who knows, maybe Dave Aranda would move to Iowa City. But Rapelor would match UI's salary offer and recruiting is pretty easy for Aranda to do from Waco. And I don't think his chances to make the playoff improve with a move to Iowa, nor would the facilities be an upgrade.
Barta's call list probably depends on what year he makes the call but if KF had a stroke and had to retire immediately I think this would be Barta's next moves:
1) He'd ask Phil Parker if he wanted the job. I'd be stunned if Parker hasn't been approached for head coaching jobs before, seems to prefer being an assistant and not having to deal with the media on a regular basis. But he's gotta ask and if Parker wanted to stay on as DC any incoming coach would have to keep him.
2) Once that happens Barta will reach out to Bob Stoops to see if he has interest. I kinda think that would be a bad hire but at least for a few more years until he ages out, Bob is probably Barta's first phone call.
3) If Bob turns it down, next in line is probably his brother Mark. Mark is paid pretty well at Kentucky and has built a pretty solid foundation there, no sure thing he would take the job. I think he'd take it and if I were a betting man, that's who I'd bet on replacing Kirk as long as that's not a decade away.
4) If he turns it down then it gets interesting. Levar Woods would be an interesting candidate because he's clearly a good coach but like Kirk Ferentz has never been a OC or DC so he'd be another CEO type coach. I wonder if they can't get one of the Stoops' if they won't target an offensive coach. It just seems like whatever the faults of the previous coach was, the AD goes out of their way to hire the opposite.
So I guess in summary, I disagree with your theory mostly because I think Iowa will limit their options to someone with a connection to Iowa. I think that's a bad philosophy that could turn out ok because I think some of those options are actually good coaches.