BLUF: Leach is a good coach but is a nightmare for an AD/BoT/Boosters to deal with. That's why he isn't getting looks, not because of his coaching ability.
Regardless, most of those programs currently have an alum with a good record (UGA (no HC record, but an alum), Mich, Miami, Neb) or an internal hire (Ohio State, Oregon, Oklahoma) with no HC experience. Well, Cristobal was HC at FIU and his record was pretty bad.
FSU, Penn State and LSU didn't hire an alum, but they did hire a local guy whose dream job is that school and had adequate/good HC track records... but all did have some level of HC experience. Orgeron is really the only one who didn't have an excellent record, but it was Ole Miss where everyone fails at unless they commit a massive amount of violations.
Arizona isn't a big time program, nor is Mississippi State. Good lord you really put those in there with the other programs?
LA and a weakened PAC-12 hired Chip Kelly, not UCLA.
TAMU is above having to look at Leach, even if he isn't a PITA. A&M is probably one of the best jobs in the country and that school has unbelievable funding and recruiting ability. We're nowhere even close to A&Ms stratosphere right now.