Most teams don't win super bowls either. However the ones that do...
Steelers: Polamalu, Harrison have to both be considered elite.
Patriots: Brady, Moss, Belicheat = definition of elite. 3 more than us
Giants: Umenyiora may have been their only elite player in 07 but, Plax, Tuck, Pierce, Shockley, Strahan are all in the vicinity of and would be/would've been upgrades to us.
Not that I disagree with your point, I just feel there is a definite talent gap between these perennial SB contenders and the Bills, the most glaring off which being coaching staffs. Would trade our entire staff for any of those three's any day.