I'd take the one not on your list, 1982. If we win that game we may have been able to dodge Dan Marino completely. Let's say Woodley somehow flukes a big game, or something comparable to his games within the AFC playoffs, and makes a handful of big plays similar to the early pass to Cefalo. Maybe at that point Shula doesn't think we need a QB a few months later, or perhaps the Redskins snag Marino at #27, instead of settling for Darrell Green one spot behind us.
A guy can dream. Understand I never disliked Marino. I hated the style of football he brought, a no chance style once Shula caved in to it and refused to insist on physical balance.
If I had to pick one on your list, I choose 1984. No way I want to risk the 1972 unbeaten season by winning the title a year earlier. No guarantee we go 17-0 if we already had that ring. And 1972 is what sets us apart, much more than 3 straight titles would have.