This is a perfect example of misleading statistics. You've managed to be about as misleading as possibly without lying by manipulating stats to fit your agenda. I'm not at big Shanahan guy, and I blame him for breaking Snyder's new toy (RG3) by leaving him in long after he should have been pulled, but to take away his accomplishments is bull ****.
You want to lay his SB wins on Elway. Tell me this; how many SBs did Elway win without Shanahan?
You compare his career W/L record (a ridiculous metric to judge a HC, I might add) against St. Doug's single season record, which completely ignores the fact that the Redskins were a steaming pile of **** when he took over and by his third year won their division only to fall to a poor record the following season due to the QB he broke. To look at that stint as an abject failure is just plain !@#$ing stupid. I'm sorry to be so blunt, but it's the truth.
Again, I'm not a big Shanahan guy, but anyone with a scintilla of objectivity can see, especially given the Bills current situation, that we could do a lot worse.