Here is the QB landscape as currently constituted in the NFL. There are roughly 100 QBs rostered or free agents fighting for a spot in the league. That's basically three per team. I will post them by round rather than one post listing a lot of guys.
FIRST ROUND SELECTIONS:
Trevor Lawrence 1
Joe Burrow 1
Kyler Murray 1
Baker Mayfield 1
Cam Newton 1
Jared Goff 1
Matt Stafford 1
Jameis Winston 1
Zach Wilson 2
Mitch Trubisky 2
Carson Wentz 2
Marcus Mariota 2
Trey Lance 3
Sam Darnold 3
Matt Ryan 3
Blake Bortles 3
Tua Tagovailoa 5
Justin Herbert 6
Daniel Jones 6
Josh Allen 7
Ryan Tannehill 8
Josh Rosen 10
Blaine Gabbert 10
Patrick Mahomes 10
Justin Fields 11
Deshaun Watson 12
Mac Jones 15
Dwayne Haskins 15
Joe Flacco 18
Aaron Rodgers 24
Jordan Love 26
Lamar Jackson 32
Ted Bridgewater 32
That's the list of 33 guys that are still around and represents about a third of the QBs on rosters (and a huge majority of starters). Going back 15 drafts, first round guys out of the league include Paxton Lynch, Johnny Manziel, EJ Manual, Robert Griffin, Brandon Weeden, Jake Locker, Chrisitan Ponder, Sam Bradford, Tim Tebow, Mark Sanchez, Josh Freeman, JaMarcus Russell, Brady Quinn, Vince Young, Matt Leinart, and Jay Cutler.