Cooper Rush
He is a slightly above average QB IMO. He stepped in when Dak was injured and went 4-1 against teams like CIN and NYG, both of which are in the playoffs to date. He can execute the scheme in a relatively safe manner so long as the run game and short to intermediate passing game is there.
I think that he would be a good fit here overall but I don't think he'd be much of an upgrade over AD. I also don't think that trading draft picks for him or somehow manipulating the cap to snag him would be in our best interest.
Jones is going to want a lot for him simply because they have no one to backup Dak with exception to DiNucci who is a nice dude, but doesn't amount to much on the field.