Did some research. Was wondering how many players have had superstar level impact while NOT being either a primary facilitator nor defensive anchor. Everyone knows Barkley is one of the most unique players ever, but this further demonstrates his game: Player Season Finder | Basketball-Reference.com . He's on that list 5 times. Dr. J and Karl Malone had one such season each, the rest anchored a defense.
Edit: I don't know who Bob Lanier was, I was thinking it was a different Pistons center, Bill Laimbeer.
I remember Bob Lanier. He was a really good player who was famous for, among other things, having huge feet.