Most of the guys on that list were underwhelming without a doubt (just cause they're not busts doesn't mean much).
Missing out on a massive haul for someone like Sam Bradford would be horrible.
No order but 10 greatest off top:
Brady
Montana
Manning
Rodgers
Marino
Mahomes
Unitas
Brees
Young
Favre
None of them are Fields or LJ or Mike Vick level athletes obviously but Mahomes/Rodgers/Young are definitely above average QB athletes.
Could possibly make an argument for Russell wilson...
The one bad throw he made was the 3rd and 10 RZ throw to Kmet that was almost picked. Kmet broke free from the coverage but Fields tried to throw him a bullet instead of lofting over closer to the back of the endzone. There was no safety there should have been a TD for sure.