Oakland Raiders:
Gene Upshaw
Art Shell
Jim Otto
George Buehler
Bob Brown
I give these raiders the edge because they played at a time when the defenses were literally dirty and vicious as hell. I would hate to be a O-Linemen in the early 70's.
cowboys - which is exactly why emmitt smith can't even hold barry sanders jock strap. smith was legit, but sanders was a legend. but ya, cowboys, hands down. best i have ever seen. i am 32 so i'm not gonna speak on teams before my time though.