Rodgers has the athleticism of John Elway, the intelligence of Payton Manning and the arm strength of Dan Marino. He is a God and he is a blast to watch play the position. We can keep pretending he isn't the best to ever play based on team-based outcomes, but individually no one has ever played the position better.
The only argument that exists otherwise is that we don't really know how good guys like Bobby Lane and YA Tittle were, and it's hard to guess how good Johnny U would be. But like in all sports, there is seemingly universal agreement about the top two or three of all time (Brady, Manning, Montana) and Rodgers is a better quarterback than all of them...and it's not particularly close.
I almost think it's easier to appreciate him because the team as a whole hasn't had wild, dynastic success. There is no real Packer fatigue like there is Laker and Patriot and Heat fatigue so we can appreciate how great Rodgers is without the burden of saying how great the Packers are (for non-Packer fans).