Mike Norvell seems like he'd be a tough get because he's usually at the top of the names every season. But you know with that you still have to keep performing up to standard every year or your once hot burning star could turn to embers. So that plus the fact that he hasn't landed one yet, especially Arkansas recently, could make him possible but on balance I think still a hard one to land. I like Seth Littrell myself but he too is somewhat similar but never hurts to send out feelers to them when necessary.
Still like Dave Aranda if he's willing to go towards a spread. He worked under Leach as a GA and other spread offenses at Hawaii and Utah State so if that rubbed off on him and influenced him that would be good. I actually have seen him talk about being a HC finally, before I wasn't even sure if he wanted to be one and wondered if maybe NFL DC was his dream job. One of his daughters loves Broadway so that couldn't hurt lol. But personality wise if you don't like Ash (who I think is normal personality wise frankly) forget about Aranda. Personality wise he's as bland as Paul Chryst, paint drying might be more exciting. You can definitely feel his love of football and talking about the intricacies and schemes of it. Me I'm more about aptitude that personality so it doesn't bother me but I know it would for many here.
If I had the money you would be AD tomorrow