Trevor Lawrence
Justin Fields
Zach Wilson
Dak Prescott
Tom Brady (I'd more say Tampa isn't looking for one, especially not 30+ years and $10M+)
Kirk Cousins (Vikes aren't moving off him, it'd be a $41M dead cap hit)
Sam Darnold
Drew Lock
Taysom Hill
Jameis Winston
Trey Lance

Clearly some of those are better than others, but there's not that many openings for starters. Let's say Dak, Brady, Cousins stay, as well as the others rumored to move - Stafford, Jimmy G, DeShaun Watson, Matt Ryan. It's not likely they all stay, but if they leave it creates one opening and fills another, so net neutral.

And the Jets/Jags are clearly drafting a rookie.

So now we're down to
Patriots
Broncos
Washington
Saints

To be filled by some combination of Darnold, Winston, Taysom, Lock, Cam Newton, Wilson/Fields, Lance, all of whom (minus possibly Winston) are much cheaper in salary than Hill