It’s difficult to line up quarterbacks across era, because the game has changed so much. (Would Montana have thrived in an RPO world? Maybe not.)
It’s even difficult to compare contemporaries, because the context definitely matters.
Would Phillip Rivers — an unselfish (or, anyway, really godly) dude who may have made the same concessions as Brady did for salaries — have won a few or several Super Bowls with Belichik instead of hardly any playoff games with (I looked it up) Schottenheimer and Norv and ‘Mike McCoy’ and Lynn? I’m not sure, but he would have gotten at least one.
So, I think it’s dumb to call one guy the best ever. You just can’t. (You can’t in baseball. The majority would say Tiger and MJ in their sports, though the Nicklaus/Bron folks have great arguments.)
It’s fun to argue. (What about Rocky Marciano? He whooped Joe Louis’ ass. What about Rocky Lombardi? He whooped Peyton Ramsey’s ass.)
All that said, anybody who doesn’t have Brady in the top ten is very very very stupid.
Super Bowls as the end-all, be-all are not a good measure. Bradshaw’s career TD-INT was 212:210 (!) and his career completion percentage was 52%! The game has changed.
(Greg Cook played 11 games for the Bengals in 1969 and then got hurt. Bengals fans imagine that they were the Steelers if only he stayed healthy. He did have a more productive career than Connor Cook, though Connor made much for $$ and has a career playoff start.)
The game has changed SO much. These offenses seem to scheme so much more to get guys open and into space. When I was a kid, it seemed all you had was play action, and maybe a flea flicker.
At some point in the last five years, some tv commentator quoted some head coach or some offensive coordinator as saying “geometry never has a bad day”. I like that line.
Neither the internet nor the anonymous coach liked it as much as I did, however, because I can’t find it anywhere.