Since the first Superbowl (or the inception of the NFL) Tom Brady has the highest winning percentage by a sizable margin 77.6%. Roger Staubach is No. 2 with 73.9%.
For a complete list refer to this Wikipedia site;
http://en.wikipedia.org/wiki/Most_wins_by_a_starting_quarterback_%28NFL%29
And sort by the Pct. column. The numbers are in decimal equivalent, so move the decimal to the right two places to get your percentage.
The information below is incorrect, because Otto Graham did not play in the NFL like the question asked. Graham played before the merger and it was not called the NFL at the time making the info below incorrect.
Also if read this Wikipedia page http://en.wikipedia.org/wiki/Daryle_Lamonica it is incorrect, because some will say that Daryle Lamonica and Otto Graham have higher winning percentages that Tom Brady and they do, but as stated before Graham did not play in what we call the NFL. Lamonica only played only part of his career in the NFL and his winning percentage in the NFL was lower than Tom Brady's. Lamonica's winning percentage before the NFL was about 90%.
(1) Otto Graham
(2) Tom Brady record of 83 wins / 24 losses for a 77.6%
(3) Roger Staubach record of 85 wins / 29 losses for a 74.6%
(4) Joe Montana record of 117 wins / 47 losses for a 71.3%
From 1933 to 2010, the Steelers are tied for 14th overall in the NFL with a .520 winning percentage.
298-136-3, is .685
The highest rank for a skill is 1
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highest rank in the world is : SECRETARY GENERAL OF UNITED NATION
Reichsführer-SS. That was the highest rank in the SS which was reserved for him.