Does Montana get in without Rice, though? Well he did win a Super Bowl without him so maybe. But Rice's career was a massive chunk of Montana's. I don't think you can separate out Montana from my claim.
Montana stats before Rice played his first game (3 full seasons plus a strike-shortened one and an additional 1/2 season's worth of games)
1324 completions
2077 attempts
15,609 yards (243 yards per game average
63.7% passer (he retired at 63.2% nine seasons later; 23 of the 24 guys ahead of him all played in 1998 or later except one, Steve Young)
106 TDs
54 INTs
7-1 playoff record, sole loss was aided by the officials
LED LEAGUE
completion % twice (did it 3 more times with Rice)
TDs (once)
Two top 5 MVP vote finishes
Two Super Bowl rings, winning the MVP both times
3 Pro Bowls
YARDS PER GAME
1981 - 9th (222) but was only substantially behind Dan Fouts and Tommy Kramer
1982 - 2nd - behind Fouts
1983 - 5th - behind Fouts, Lynn Dickey, Bill Kenney, Danny White
1984 - 6th - behind Marino, Neil Lomax, Phil Simms, Fouts, Dave Krieg
Rice simply took Montana from an "on his way to the Hall already" go to a "no question first ballot guy."
I guess I would amend my point and take out EVERY... but certainly it is difficult to name a great QB without looking on his rosters and seeing great WRs. Or, great OLs. No one goes it alone.
One final thought that did just occur to me, however. Who were Dan Marino's great WRs? And since I can't answer that, is that a big reason with Marino never got that Super Bowl?
Marino's big guns his rookie year were "the Marks Brothers," Mark Clayton and Mark Duper - and a third guy who was good but not great named Nat Moore. Jimmy Cefalo was solid if unspectacular - and you have to remember they tossed a lot of balls short out to former Bama RB Tony Nathan as well.
Those guys were GOOD receivers - obviously not Rice because nobody is.