Chamberlain/Greer/Cunningham played exactly 2 full seasons, but only 1 post season together and they put together what was perhaps the greatest season in NBA history in 66/67 going 68-13 in the regular season and 11-4 in the post season. In the playoffs they destroyed the Royals (3-1) led by the trio of Robertson/Lucas/Dierking, then dispatched the Russel/Hondo/Jones Celtics in five games, before dispatching the Thurmond/Barry Warriors in six. Given the very short time together I can see why they didn't make the list, but in the basically the one full season and one other regular season (62-20) they were together they were unbeatable.
West, Chamberlain, and Goodrich were also quite a magnificent trio for the Lakers, though again they were only together for two seasons (1 win, 1 finals loss).
Reed/Frazier/Debusschere/Bradley won two titles and had another appearance for the Knicks. Certainly worthy of a mention.
You also have the Sixers from the 80's. Moses Malone joined them for the 82/83 season and they promptly went 65-17 in the regular season and 12-1 in the post season. The top 3 were Malone, Dr. J., and Mo Cheeks (they also had Bobby Jones and Andrew Toney). They never made it back to the finals though even after Barkley joined the team a couple of years later, so I can also see why they weren't on the list, though I did think they were worth mentioning.
Kareem, Oscar, and Dandridge had a nice little run in the early 70's though did only win 1 title.