And what would stafford have been if he was coached by them in his 20's / early 30s?He simply isn't. Drew Brees is one of the best QBS of all time. he had garbage arm strength but made up for it with anticipation and accuracy.
Ryan was a much better player than Stafford. Stafford has been better in his 30s. But again, I think if Ryan was coached by McVay or Shannahan in his late 30s he would have some great looking numbers after 30 too.