Four hall of famers - Bird, McHale, Parish, Walton. All 6'9" or bigger (really probably 6'10" because I think Bird was actually that height). Walton played his role perfectly that season.
It is a little hard to believe that Walton is in the hall of fame though. Great college career, and obviously a great talent, but didn't have a great pro career. Injuries obviously, but played 60+ games only 3 times in his career (80 in the 85-86 season!). Never averaged even 19 points a game even once in his career. For as great a passer as he was, averaged 5+ assists just once in his career. Career line of 13.3 points (meh), 10.5 rebounds (decent but not outstanding for a 7-foot center), 3.4 assists (nothing wrong with that but nothing great either), 2.2 blocks (pretty good). I mean, he was a fine player but didn't play tons due to injuries and when he did play he was really good but not CRAZY good. I think he was one of those "his play was better than his stats indicated" kind of guys.