I agree with all of these players so far, except I think Bledsoe is a bit questionable as a choice because 1) I think several people still hold him in very high regard 2) his performance is still in question until he plays out of his deer-in-headlights funk (btw, I think he'll do much better this year).
[Edit: MikeH added Ruben while I was typing. Ruben was not underappreciated in Buffalo!]
Here's the only other guy I think is worth adding to this list for the Bills: Pat Williams. Pat has been a solid warrior for us, yet doesn't seem to get much love from the fans. I really hope he tries the market next year, finds little interest in him because of his age, and re-signs with the Bills.
A bit off topic, but who saw him on the Eric Moulds Show last year? The guy looks scary!