The Steelers were 4-0 in super bowls during that run, meaning they did not make it to the big game twice.
In the eight year period from 1960 to 67, the Packers were 5-1 in NFL championship games. They also did not make it twice.
This 49'er fan votes for the Packers as the all time best.
As a 12 year season ticket holder I will also say this: The Cheeseheads are the best visiting fans in the league (Saints a close second).
Yes, of course... I meant in the Superbowl era.