The only problem with this thread is that it shouldn't be based on "starters", but rather high-level contributors. So, for the Packers, you would include Sherrod, Cobb, Bulaga, Burnett, Newhouse, Starks, Raji, Matthews, Lang, Nelson, Finley, Sitton, Flynn. That is actually 13 players that either contributed heavily to a Super Bowl win or a 15-1 regular season. All of the offensive linemen mentioned played, or stepped in well for injured starters. Raji, Matthews, and Burnett are fantastic players. Finley and Nelson are top offensive players. And Starks dominated during the playoff run to the Super Bowl. That looks a lot better than your "6 starters out of 34."
As far as the Steelers are concerned, Heyward, Pouncey, Worilds, Sanders, Antonio Brown, Hood, Wallace, and Mendenhall are all big-time contributors for the Steelers. That's 8 guys. Wallace, Brown, and Sander are 3 unheralded WRs that have all contributed. Wallace is one of the best in the league. Heyward and Hood are going to anchor their D-line for years. Pouncey is going to anchor their O-line for years. Mendenhall has been a top RB. Worilds will step in as soon as the Steelers dump another high-priced LB like they always do.
For the Dolphins, Long, Pouncey, Langford, Hartline, Smith, Davis, and Odrick are really the only guys that have made any kid of impact. Clemons and Reshad Jones are pretty terrible and would not start on many other teams (and neither on can lock down a starting spot in Miami). Merling and Henne were big-time busts. Thomas, Gates, Clay, and Wilson didn't really show enough to say that they will be major contributors going forward. If we want to be homers, sure we can overrate them. But legitimately, they were not consistent and all have major question marks.