Well this is just my thoughts on whom should be the best Quarterback. I am not saying that one is the GREATEST, but just these men are of the finest in NFL history.
     NFL has had the question raised once again since Brett Favre has retired, Who is the Greatest Quarterback in the NFL?  Well I am just doing the Quarterbacks i know of...
This list is done only by stats, not my opinion. There are six and they are listed below by their rating's from NFL not me

 1) Peyton Manning: 94.7% with 45,628 Passing Yards and 333 Touchdowns

 2) Tom Brady: 92.9%  with 26,446 Passing Yards and 197 Touchdowns

 3) Joe Montana: 92.3% with 40,551 Passing Yards and 273 Touchdowns

 4) Dan Marino: 86.4% with 61,361 Passing Yards and 420 Touchdowns

 5) Brett Favre: 85.4% with 65,127 Passing Yards and 464 Touchdowns

 6) John Elway: 79.9% with 51,475 Passing Yards and 300 Touchdowns

   So as you can see either way you look at it, by their Rating's, Touchdowns,or the total Passing Yards in their Career, Brett Favre could be the  "Greatest" Quarterback in NFL history. His Quarterback Rating isn't as high as the first four men listed, But everything else he has the most of anyone. So i will leave it as it is stated above for you, But all the Packer fans could have been right in thinking that their boy Favre is and still is the "Greatest" Quarterback.