Peyton is simply not a quarterback who can be in the same conversation with the Montanas, Staubachs, Bradshaws, Farves, Manning's, Bradys, players who were able to make something out of nothing in their team's biggest game.
Not to nitpick... BUT... it's Favre, not Farve.
If Peyton doesn't belong in that group, neither does Favre. They have the same amount of Super Bowl titles. Favre threw FAR more interceptions, and the only reason he doesn't have more playoff losses than Peyton is because Brett couldn't get the Packers/Jets/Vikings to the playoffs as often as Peyton has with the Colts/Broncos.
If neither of them belongs, does Peyton's brother Eli? He has one more Super Bowl title, and both WERE won in clutch situations, but he's far less consistent than any of those other names and has had far more BAD games than brother Peyton (like the nine that the Giants lost this season, for instance). How about Staubach? He lost just as many Super Bowls as Peyton did, both to Pittsburgh. Tom Brady has lost two as well, both to Eli's N.Y. Giants.
Peyton is no Joe Montana and has never had as complete an offense as Terry Bradshaw enjoyed, nor as brilliant a head coach as Tom Brady has been privileged with, but he's done enough in his career to be mentioned among the all-time greats.