Brady/Montana/Marino/Manning are all valid options. None is correct, it's all a matter of perspective and what you'd want as your quarterback.

I would NEVER, EVER include Manning in my list of greatest QB's of all time, nor do I consider him to be anything more than a glorified Dan Fouts/Warren Moon....dude has a
losing playoff record: 3-6..that is PATHETIC..I'm not going to include Manning in this group UNTIL he wins a SB..with the HOF talent that surrounded him ( Harrison, Saturday, Edge) there is NO excuse for him NOT winning or at least playing in a SB by now, plain and simple..
Personally, I like QB's who can actually WIN the big one, who can win despite adversity, who can drive the team down the field on the final possession for the winning score in the biggest game of their lives, ala Montana, Brady..Elway has proven to be in the discussion because he made it to 3 SB's without a solid running game, with average WR's ( Amigos), and with little else around him. This is why he got blown out three times before winning a pair of SB's..he finally had a talented WR ( Smith) and Terrell Davis at RB, not to mention a good defense.
If you think Manning can drive the Niners down the field against Cincy like Montana did, you're
If you think Manning can drive the Patriots down the field on the final possession in two different SB's ala Brady, to win it all, you're
and for good measure, the greatest QB of all time, without a doubt, was Otto Graham..quarterbacked the Browns to 10 championship games in 10 years, won 4 championships in the AAFC and 3 NFL titles, along with 3 AAFC MVP awards, he also compiled a lifetime 105-17-4 regular season record..
"The test of a quarterback is where his team finishes," said Paul Brown, Graham's coach in Cleveland. "By that standard, Otto Graham was the best of all time."
you still like Manning and his 3-6 lifetime
postseason record?!?!
one more QB that supercedes ALL others except maybe Graham, is Johnny Unitas..
and Bart Starr was better than anyone NOT named Graham and Unitas..
just check out his post season record, the # of championships ( 5) + SB's (2) , and SB MVP's (2) he's won..
Manning couldn't hold Starr's jockstrap..
Marino, Brady, Elway, Montana are QB's for the ages..Manning ,most definitely, IS NOT..