1. Duncan-has the stats, accolades, longevity. GOAT 4 man.
2/3. Barkely/Malone-too close to call. Great rebounders, defenders, played well with back to the basket or facing up, both could shoot, could run the floor, and knew how to close games.
4. McHale-one of the greatest post players to have ever played. He basically set the template for the Arsenal of moves a post-player should possess. Put up consistently great numbers as second option, and has a nice collection of rings.
5. Dirk-the best pure shooter in the history of big men. Consistently great scorer, great defensive rebounder, and made his teammates better. Led the Mavs to a dozen or so 50+ win seasons, despite not having the best supporting casts.
Honorable mention: KG