Rice is the greatest WR of all-time IMO but to me the greatest overall player has to be a QB. The QB is the most important position on the field and I would take Brady, Montana, or Peyton over Rice as far as greatness goes. Those 3 QB's are just irreplaceable IMO.
Brady has had some very good teams around him, esp on Defense to help him with those SB win. Even this past SB with the Bucs. Brady did not win that SB by himself, the defense played a major role in that win. Brady just did his job to not lose it by playing good game management football.
Also helps in the first few SBs the Pats were found to be cheating. Lets not brush off the significance that spygate played in games they only won by 3 points each. Without spygate they more then likely lose all 3 of those SBs. But that also plays a factor against Belichick, lol. Even after spygate, both continued to be elite in their roles for a very long time.
Im not down playing Brady and the achievements he has made. But i cant down play what Bill has done either. Both will go down as the greatest QB and Coach ever for a very long time. I dont think either will have to do anything ever again to prove it.