He is essentially the modern day Peyton Manning. Perhaps the "best REGULAR SEASON qb of his generation", strong argument here, but a playoff underperformer and choker.
Aaron is probably more talented than Peyton though and his stats, although inflated due to rules changes, isn't as compounded by playing half his games in a dome like Peyton.
No disrespect to either though, if Aaron retired he will be Top 5 to 10 easily today.