The easy out here would be to name a No. 1 and No. 1a at the top of this list, but that is a cop out. The reasons why Troy Aikman could be No. 1 are listed below, but while Aikman had a five-year run like no Cowboys signal caller before or since — and he does have one more Super Bowl win to his name — there are two very compelling reasons why Staubach is the clear No. 1 on this list.
Like Aikman, Staubach was a six-time Pro Bowler, but Staubach led the Cowboys to six NFC Championship games in eight years and won two of the four Super Bowls he led the Cowboys to. The two losses came to one of the best teams in NFL history, and the Steelers only won those two battles by a combined score of seven points.
While Aikman finished a decent 94-71 in the regular season and 11-4 in the playoffs, Staubach was a stellar 85-29 in the regular season and 11-6 in the playoffs. The passing numbers favor Aikman, only because the NFL of the 70s was not a pass-friendly league like it was in the 90s. Staubach was also more of a threat than Aikman was when he scrambled, averaging five yards a carry and scoring 20 touchdowns on the ground.
The deal sealing fact for Staubach is that he had to serve his five-year commitment with the Navy after winning the Heisman Trophy before playing in the NFL. There is no way of knowing what kind of numbers Staubach would have compiled with those five extra seasons, and given his history in the postseason, the Ice Bowl and the first Super Bowl might have had a different outcome if Staubach had been able to go straight to the NFL out of the Naval Academy.