i just went through this same thing as i am done waiting on Russell Wilson and have Fitzpatrick as my backup.
I was able to swing Fitz and Landry and received Brees and Hyde (throw in) . pretty happy about it as i can afford losing Landry.
That being said, this is really dependent on your league. start with the bottom feeders first as they will be most likely to be tilting and want to pivot. you need to see whos weak at RB and whos weak at WR and put together offers from there. Also target guys who are hoarding 2 qbs as they will be more likely to part with one.
Breida and John brown are obviously first to go. if you can get an elite guy like Newton or Rodgers id part with Keenan Allen to make it happen. you have the depth to live with it. even at running back imo.
Look for stacks as well. Matt Ryan, Rodgers, or even Rivers would be great targets to pair with Julio,Adams, Keenan.
Its so league dependent though man especially for QB’s. that being said with your depth id be willing to overpay slightly if i wasnt able to get a fair deal done. with that team, you cant afford to have Fitzpatrick poop the bed and get yanked from a game, and Stafford has an extremely tough schedule and just lost Tate (you saw how bad they looked last week). You got the firepower to go all the way IMO.
Targets in no particular order:
Mahomes (just check)
Dalton (last resort)
Guys i wouldnt target:
the rest of the guys arnt even in the same tier. so hopefully thats enough options for you to get started. hope you can get a deal done.