Look at all the quarterback arguments:

Wins- He has one of the best winning percentages of all time.

Stats- He is consistently at the top of the league in yards, TD's, and qb rating. His career numbers are becoming some of the best ever as well

Superbowls- Obviously not the best way to judge a QB, but he does have three rings and two MVPs which is pretty damn impressive

Clutch?- Yes

You look at all the factors, he's already one of the top 5 guys all time no matter what way you slice it. Adding another ring would just make it easier to call him the best of all time