This also depends on what you consider for accuracy. Simply completion percentage or do you take into account the average length of the passes being thrown? I don't put a lot of stock into the completion percentages of guys who throw a lot of short passes. David Carr had a 68% completion rate a couple of years ago but I don't think he attempted more than a handful of deep throws all season.
Montana & Young have very high completion percentages but they didn't throw deep very often as the WCO isn't designed that way. They could and did it very well, just not as often as some others.
Aikman, on the other hand, threw the ball about 10 yards further on average and had a very high percentage as well. His passes also were placed where the receiver could catch it easiest.
Ken Anderson was a machine throwing the ball in the 70s & 80s and until Aikman, was the most accurate QB I've ever seen play. He had great touch on his passes too and knew when to use heat and when to take a little off.
People forget how accurate Marino was, especially on his deep passes to Duper & Clayton. Everyone focuses on his quick release but his touch on long throws was outstanding and his accuracy on short passes rivaled Montana's.
A lot of folks are down on Peyton Manning but he is still the best QB in the league right now IMO.
Bart Starr was amazingly accurate with his passes, particularly deep passes and his receivers were usually big, slow guys (Boyd Dowler & Max McGee) who needed the ball to be placed accurately for them to catch it as they were usually fending off a DB on every route. The only caveat with him was that the Packers were a run-first team and he didn't have to throw as much as some of his contemporaries.
