This is painful but, how many many teams would switch QB's with us right now.
NFC East: Eli, Alex Smith, Wentz
NFC West: Jimmy G, Wilson, Goff, Rosen
NFC North: Rodgers, Cousins, Trubisky, Stafford
NFC South: Brees, Cam, Ryan, Winston
AFC East: Brady, Tanehill, Josh Allen, Darnold
AFC West: Rivers, Mahomes, Carr, Keenum
AFC North: Ben, Flacco, Mayfield, Dalton
AFC South: Luck, Watson, Mariota, Bortles.
Think about it, maybe 4, Eli, Winston, Bortles, Tanehill and those 4 could be toss ups.
BTW, I put the 2018 1st round rookies even if they are not starting yet, I'd have a hard time imagining that the GM's on those teams would make that trade.
Dak ain't a franchise QB