Every dynasty, every one, is based on a crappy division.
Except the 90’s Cowboys.
70’s Steelers four team AFC Central was possibly worse than even the 80’s 49ers’ four team NFC West except for a brief stretch with Pastorini and Earl Campbell in Houston
70’s Cowboys NFC East was an absolute joke minus like one good year for Washington. The 2000/2010’s Patriots’ AFC East— historically pathetic for two decades.
90’s Cowboys NFC East featured four straight Superbowl champs from three separate teams. Thats why the rest pale by comparison.
Not to mention the whole 3/4 thing. The big difference there is that we won Super Bowls in straight up dominating fashion, and the one year we didn't win we made it to the NFCC and lost to another powerhouse team that could've easily won 2-3 during that stretch in their own right, plus the obvious mitigating circumstances.
The Patriots barely eked out all three of their Super Bowls during the first run and the year they didn't win it all they didn't even make the playoffs.
The totality of the Patriots dynasty is clearly the greatest of all time, but you can't lump the 2016 Patriots in with the 2003 Patriots when the only links are Brady/Belichick, so for me the greatest team (which can only be roughly a 5 to maybe 7 year stretch given roster turnover) of all time are those early 90's Cowboys.