Alone at the top: Aaron Rodgers
Canton-bound: Tom Brady, Peyton Manning, Drew Brees
Pro Bowl-caliber: Ben Roethlisberger, Andrew Luck, Matt Ryan, Philip Rivers
New wave: Russell Wilson, Cam Newton, Colin Kaepernick, Robert Griffin III
Established franchise quarterbacks: Tony Romo, Matthew Stafford, Jay Cutler, Joe Flacco, Eli Manning
Borderline franchise: Alex Smith, Nick Foles, Andy Dalton, Carson Palmer, Ryan Tannehill, Josh McCown
Question marks: Jake Locker, Sam Bradford, EJ Manuel, Geno Smith
Bridge quarterbacks: Michael Vick, Ryan Fitzpatrick, Matt Cassel, Chad Henne, Brian Hoyer, Matt Schaub
Impact rookies: Johnny Manziel, Teddy Bridgewater, Derek Carr, Blake Bortles
Seems like a pretty good list.
I think I'd move Alex Smith up into established franchise though. He has done well on multiple teams with multiple playoff runs. The same cannot really be said for anyone else in his category (or half the players in the category above for that matter).
I think I'd move Philip Rivers down because he's never really done anything at all of value. Put him in established franchise.