Somebody mentioning Weinke is probably on the right track too. Promoting from within would be pretty underwhelming to the fan base though.
You know Pruitt isn't going to hire anyone who isn't Pro Style, which I think eliminates Kingsbury, though I don't think he'd come anyway. Hugh Freeze is the first place I'd go. Yeah, he had his issues, but he wouldn't be the head guy and you know Pruitt is going to keep a sharp eye on him.
I'd say be prepared to be disappointed. That seems like a common theme for Vol fans. Had Butch hired Mark Helfrich like everyone hoped, the 2016 season could have been very special, and Butch would probably still be here and actually successful despite his flaws. Coordinators are huge hires, so I hope this doesn't eventually end CJP's tenure here.