Bill Russell would have to be a PF in today's game and there is no argument for him to be included in the top 3. Ja-blunt, Wilt, Dream, and Shaq had better all-around games than Russell.
This is just ignorant. Sorry, but this is an "opinion" based on nothing but the fact that the guy is under7'0". He was not a PF. He was the most dominant defensive presence in the middle in the history of the game. He didn't just block shots - he turned blocked shots into fast breaks. And rebounds? They didn't count them in those days, but if they did, both Russell and Chamberlain would have numbers unimaginable to today's players.
Jabbar did win six championships and a record SIX MVP trophies. And besides, longevity should count towards greatness. He's easily in the argument for #1.
I think Russell, Wilt, and Jabbar are the obvious Top 3, in any order. Arguments can be made for #1 for all three of those guys.
It's #4 where it really gets interesting. I personally have Olajuwon there, who was one of the most gifted, talented, and skilled centers ever. He absolutely took Shaq, Ewing, and David Robinson to school when he played against them.