Had a post on another board about dynasties, and thought I'd bring it over here as a question. Starting from the first Super Bowl year, who do you consider to be the top four (4) NFL dynasties? Feel free to add your own if you think I missed one; though I don't think but six of the teams shown presented really even qualify IMHO. Please pick ONLY FOUR TEAMS. You can list your four in order in a post and say why you ranked them if you want.