I'm *not* a Romo fan, but I think you made many good points re: QB's. I'd definitely put Romo in that category with Morton and White. There are hard stats, then there are results, the intangibles. Some QB's have the ability to pull out close games, or just stay way ahead. Others just don't. The 'clutch' moments. Staubach vs. White is a great example. OTOH, maybe Roger the Dodger just wasn't good at staying ahead, thus requiring a lot of last-minute heart-attack come-from-behind wins. Maybe he needed that pressure to perform. They called 'em the Cardiac Cowboys for a reason.
Without going into too much NFL playoff history, I find it interesting to compare the Cowboys history during and after Landry. For Landry's first six years, no playoff trips. From '67 to '82 he had 20 post-season victories, including two Super Bowl rings. Then his last six years had two post-season games, both losses. So most of his golden years were in the 15-year middle stretch. Not a bad run.
That's 29 years of Landry.
Jerry Jones has now owned the Cowboys for 28 years. After a 2-year rebuild, Jimmy Johnson kicked off a new round of post-season wins, 12 in a 6-year period, including *three* Super Bowl rings. Since 1996 the Cowboys have managed only two wild-card wins, never advancing beyond that. 14 total post-season wins.
For those who were born right after the Cowboys' last Super Bowl win, they are now old enough to drink and have never seen the Cowboys make it to an NFC championship game, never seen them last more than one week in the playoffs. That's just stunning to me!