Can't help but chuckle, you compare MJ when talking best all time to Kobe? Then you talk best big men of all time with Duncan and Shaq along side Wilt and Jabbar? Those were very good players and hall of fame level guys but as good as Duncan and Shaq were they should not be in the same discussion as Wilt and Kareen, Bill Russell should be. As for MJ, the names that I would consider as his competition for the best ever at his position are Dr J, Bird, Hawkins.
There is a very big difference IMO between best of their day and best EVER. Kobe, Shaq, Duncan are to me deserving to be hall of famers and amazing players for their day but best of all time is a different and higher level. It is one thing to be in the hall of fame, it is a different thing to have an entire wing at the hall of fame dedicated to you and that is what men like MJ, Bird, Dr J, Wilt, Kareem, Magic, Oscar, Jerry West, Bill Russell deserve in my opinion.