Cool Joe won 4 Championships, so did Bradshaw, while Aikman is 3-0. All three had great winnings percentage's in the playoffs, but nowhere in the top 10 of most passing statistic.
Montana had Jerry Rice and Ronnie Lott, two of the best players ever in their positions, and ton of other great supporting cast along the way like John Taylor, Roger Craig, Dwight Clark. Montana was also lucky to have Bill Walsh running the west coast offense, which was hard to defend in the 90's because you didn't have the same amount of video that they do today on film.