I have him behind these fellas:
Tier 1:Bill Russell, Larry Bird
Tier 2:Havlicek, Sam Jones, Cowens, Pierce, Cousey, Parish, McHale, (KG?)
probably in the middle of the pack with these guys right now
Tier 3: (KG?), JoJo White, C. Maxwell, Tatum, Tommy H, probably others
I think you need multiple titles or a whole career in Boston to even sniff Tier 2. Tatum just hasn't been around that long, and he hasn't won a title yet. I know some would put KG in Tier 2. But I dunno, I am not sure.