He is the greatest in the Super Bowl era. 9 SB appearances and 6 championships is unmatched. And still going.
That doesn’t mean he’s the greatest passer , etc...just the most successful which is whether we agree or not is how we measure QB’s. Winning and results matter. No one over time is more clutch including Montana , Elway or Staubach, etc.
His longevity has tested time which in itself places him as the greatest. Did he benefit from good teams and coaching. Of course but so did the other greats. With the game on the line there’s no other QB I’d rather have including these mentioned above. He’s proved it more and longer than anyone. Only personal bias would argue otherwise .
And I thought no one was more clutch than Montana or greater comeback ability than Staubach. There are greater pure passer but again results matter. Brady is the greatest all time winner at QB. The rest is just speculative arguments.