I think it's time to dispense with these "greatest evers." There is no "greatest ever" and the proof is the endless arguments that ensue every time someone is proclaimed "the greatest ever." It reminds me of the Margaret Cho comedy bit about her grandmother asking about a friend of hers. "Is he the gay?" And Margaret answers, " I don't know if he's THE gay. That's a lot of pressure to put on one person."
There are some great and even some all-time great teams, players, coaches but it's a plural honor at best. Personal biases have a lot to do with making these judgments. Obviously as Packers fans we will put forth Lombardi, Hutson, the '60's players and teams, the '96 team, Reggie White, etc, etc. on the lists.
As far as the Super Bowl "greatest" is concerned we are now at the half century mark with SB history. That's a wide area covering very different eras in players, rules, etc. We aren't exactly comparing apples to apples here.
Maybe if it's broken down to each decade at most you might get a more fair and accurate estimation but even then there will be the debates. Would the '78 Steelers beat the '72 or '73 Dolphins? How would the '84 or '89 49ers stack up against the '85 Bears or '86 Giants? Were the '94 49ers or the '96 Packers as good or better than any of the 3 '90's Cowboys SB winners?
There's been only one club to win consecutive Super Bowls in the 2000's to date and that was by two 3 point, last seconds decisions. We've seen a different SB winner for the last ten years now. How can any one proclaim a "greatest" from among that kind of a field.?
Have fun with it but it's ultimately the old "how many angels can dance on the head of a pin" routine.