Do you think Van Pelt wants to call plays again and would make the move? Getsy has a growing reputation but has only called plays at IUP if I remember correctly.
Everyone has said AVP is a no go given he did not graduate. If I'm him I'm holding on for something good in the NFL given where the previous Packers QB coach (McAdoo) landed. He's had success everywhere he has been (aside from Buffalo). He made Josh Freeman and Eddie Lacy look like Pro Bowlers and gets a ton of praise from Rodgers.
Getsy would be a big risk, I think he'd need to team up with Salem for at least a little while.
Some other NFL names (admittedly all long shots)
Dooley from the Cowboys has been mentioned and is now available.
Matt Nagy (co-OC from the Chiefs) is now available and would be super unlikely. Going from pro OC to college OC is a demotion, no doubt. He is, however, co-OC with a much bigger name (Brad Childress) and I'm not sure how much of his fingerprints are on the Cheifs' offense. I think he lands a pro OC job though. He has PA roots.
Another NFL name (not from the playoffs) is Greg Knapp, recently let go from the Broncos during their coaching change. Ton of experience, he probably lands somewhere back in the pros. But he does have almost a decade of pro experience.