I'm curious as to why you would think Hakeem would have been better than Arvydas anyway? Not saying you are necessarily wrong, just wondering what the reasoning is behind it. Of course he schooled other all time great bigs, but as you said, Kareem was way past his prime, Shaq was very young, so you're left with basically Ewing and Robinson.
We know that Hakeem had the ability to play against bigger guys, but he was "only" 6'10, Ewing 6'11, Shaq 7', David 7'1 and Kareem a very thin 7'2.
Sabonis was an athletic 7'4 (with shoes) guy. You've seen how Boban towers over everyone and makes guys like Chandler or Baynes look small compared to him. I think the mere size difference would have been a factor between Hakeem and Arvydas. Even David looked tiny next to him in those Olympics games. Hakeem would have had a hard time defending him at least imho.
What do you think?