New Orleans has an amazing offensive line
Kansas City has a fine o-line
Seattle has a fine o-line
Minnesota's o-line is a fine o-line
I agree on the other poster's comment about New England. So we have 9 lines now that are well constructed. That's pretty normal for a position group consisting of 5 players. You'd probobly say there's 9 secondaries that are really good, or 9 WR corps that are deep.
It just speaks to how pathetic the Dallas o-line has been for so long that some fans just assume there's no such thing as a good o-line!