Great post, K-Mack.+1! The way you rattled off the UMU QB's was impressive.
I can't rattle off the Dallas Cowboy QB's that easily, but then there have been a lot of them that I want to forget! 
That is because there are only three worth mentioning and only two of them won Super Bowls. The three are Dandy Don, Roger Staubach and Troy Aikmen. All the rest are just cannon fodder.
I can give you four more who are worthy of mention.
Eddie LeBaron was the first Dallas QB as was a Pro Bowler for the Washington Redskins in the 1950's. He is in the Washington Redskins Ring of Honor.
Craig Morton was in the Quarterback Shuffle during the Super Bowl VI-winning 1971 season with Staubach. Morton later led the Denver Broncos to the Super Bowl against the Cowboys in Super bowl XII after the 1977 season. Morton is on the Broncos Ring Of Honor.
Dan Reeves was also pressed into duty a backup QB when the other QB's were injured. He has most Super Bowl appearances of anyone (9).
Yes, the rest are just cannon-fodder! Thanks for the opportunity to reminesce of when the Cowboys were a real team, kinda like the Mount Union of the NFL.
As for Danny White, in the immortal words of Tom Landry,
"No Danny! NO!"