Tier 1: Brady, Peyton, Montana
Brady has been successful longer due to advanced sports medicine, but he wasn’t a better player in his prime than either of those 2
Tier 2: Marino, Unitas, Elway, Young, Rodgers, Staubach
You can add in whichever pre-1960’s QBs you want, but that’s an impossible comparison
Tier 3: Brees, Baugh, Kelly, Favre, Starr, Mahomes, Warner, Bradshaw
Brees accomplished surprisingly little for how crazy his stats are. He’s Brett Favre with less turnovers.
Team results shouldn’t define an individual player, but thats the imperfect world we live in. Dan Fouts would be regarded very differently on these all time lists if he got drafted somewhere better than San Diego.