My question with these guys is whether they were fast enough to keep up with today's players. That was actually my question mark on Kareem (not that he was available) though he was getting older by the time I saw him on tv. It doesn't help much that some of these highlight reels are in slow motion.
Everyone said that Karl Malone revolutionized the Power Forward spot because no one had been that big and fast before, but then there were more guys like Kemp, Webber, Duncan, KG, Amare who were just as big and fast. Some guys are timeless players. It's just hard to figure out which ones there are.