I don't get hung up on how many Super Bowls a QB is in. It's just one of the games that's played, and to get there, it takes a team effort, and good coaching. It's not all on the QB's shoulders.
After watching Packer and other NFL QBs since the 40s, I am going to rate Rodgers the best we've had, and by a wide margin. Reason? He does not throw the ball away, and give the opportunity to the other team to score. As for where he stands, among all QBs, he's one of about 10 guys that I think can all be called the best in their own rights, and you wouldn't be far off, if you even were.
The game has evolved, and the players have evolved with it, so you need to consider who is best in their era. Three, from this era, that need to be counted for sure, would be Manning, Brady, and Rodgers.
But, that's just my opinion. You're entitled to yours, even though you'd be wrong.