Damn do you people not know anything about the history of the game? I've only seen one person mention Unitas. Elway, Marino(best pure passer), Montana, and Favre are very good but none of them can be considered the best ever. Put one of them in the NFL of the 50's, 60's, or 70's and they wouldn't have survived. The rules are such now that the QB is over protected and has it much easier than in the past. Give me the tough old coots like Unitas, Blanda, Stabler, Bradshaw, Stabach, Starr, Tittle, Namath, or even Dan Fouts any day. Those guys played when it was still a rough and tumble game. QB's today have it much, MUCH easier than they ever did.