Who is the greatest center in NBA history?

Personally I think its Wilt Chamberlain. I believe Wilt may have been the most dominant team sport athlete of all time. Right there with Babe Ruth and Wayne Gretzky. I dont buy the "era he played in theory". He played against some great centers .. Bill Russell, Nate Thurman and Walt Bellamy to name a few. If his height advantage was such a factor than why didnt Manute Bol dominate the way he did? The 7ft7 Manute had 5 or 6 inch advantage over every once else.