It is easier to try it with a great/very good quarterback than to try and build 11 guys on defense who will make the list for greatest of all time. The NFL is changing & not for the good. Average teams are winning the Super Bowl, yes I include the Ravens in that when they won it all a few years ago. Today, you don't need a complete team to win it all, just health, discipline, and get hot at the right time. Even the Colts won it with Peyton, we saw this, their defense stunk during the season, but they got hot as a group at the right time beating mediocre teams.