Guys who are among the elite at their positions, and wouldn't shock me if any given season they were the clearcut #1, are:
Brady
Moss
Welker
Faulk
Mankins
Gost
Paxton
Seymour
Wilfork
Brady, Moss, Mankins, and Gost have clear-cut Pro Bowl/All-Pro positions. I don't know how to judge OGs who give up occasional sacks, but basically all four are in the discussion for best.
Seymour and Wilfork are in a logjam at "interior DL". But basically they're elite players, near the best in the league when they're on.
Faulk is the best shotgun-specialist RB, period. Maybe some of the elite generalist RBs can outdo him in that role, maybe not.
If you count Welker as a slot reciever but Hines Ward as a generalist, Welker is the best in the league by far.
I don't know whether Paxton stands alone as the best in the league or not. If it weren't for the snow angels, would fans of other teams have heard of him? How do we know whether other teams have great long snappers too?
Beyond the above, guys who wouldn't shock me if they in any given season made the Pro Bowl include:
Light (I guess, since he actually did)
Koppen
Warren
A. Thomas
I have no idea how to rate the ST cover guys.