If we can't get Rick George and if Mike Small's not interested, I think you've got to look at other Power 5 ADs who aren't highly paid but know how to raise money and pick a football coach. Two that come to mind are Ian McCaw of Baylor, and Ross Bjork of Ole Miss. As of a year ago, both were making considerably less than Mike Thomas.
Mike Small is a great coach, can raise money, and is an excellent speaker. He's one of the all time great Illini (as is his dad Bill Small). Yet, it's a huge leap for him to be an AD.
One reason I like George is that he's a football guy who has tons of other relevant experience. The AD's job basically boils down to the football program - if you hire a great football coach almost nothing else matters as the football program carries the whole department.
I like your ideas on McCaw and Bjork - great things happening in football at both programs. I'm sure there are other Power 5 guys that fit this profile. That's who we should be thinking about beyond George instead of lower level U of I guys.