I don't think he will want the job with the Commanders or Panthers. The Commanders traded away their two best pass rushers for chump change. They have no QB so it will be up to Quinn to draft and develop a rookie. The Panthers are just a mess, with a potentially crackpot owner. That sounds like a bad spot. They may want an offensive minded coach anyway.
The Chargers might be the place to go. They have some quality players on both sides of the ball, including a QB. The one issue there is the OC. Does Kellen more stay? Does Quinn want him? It might be the right situation though because they know each other and coached together with Dallas. Quinn could focus on the defense, like he did in Dallas and let Moore focus on the offense. The only question is if Quinn actually want to move and take over the responsibility of a head coach.