Had this discussion with my dad and his friend over a great dinner at my local bar and grill. Great chicken. Anyway, who is the greatest NFL coach of all time in your opinion? Now, this might be unpopular, but Don Shula. He lead the Dolphins to two Super Bowls and the only perfect season of all time. All time leader in wins (348). Winning record against every coach he played expect one. We also can't forget he lead 4 different QBs to the Bowl. So, who is yours?