I'm not old enough to remember Landry's 70s teams. They were great all around teams, though.
IMO, the 92-93 Cowboys teams were the best teams I've ever seen. Jimmy truly built a juggernaut. I recall when they crushed the 49ers in the 1st half of the '93 NFCC, John Madden said it was the best he'd ever seen any team play. That team was so good Jimmy's shadow won a super bowl 2 years after he left, because everyone knows Barry Switzer's dumb *** wasn't doing any coaching.
Incredible what the Cowboys could have accomplished if Jones could've set aside his ego and let Jimmy run the team. 25 years later, Jones is still trying to prove he's a real football man.