First, LBJ could have stayed in one place. That was his decision just as Jordan could have gone somewhere else.

He left because he wanted to win championships. Instead of getting better and better every year like Jordan, he chose to join Wade's team with All NBA player Chris Bosh as well.
Chris Bosh would have been the best big man that Jordan ever played with. Dwyane Wade would have been the best player that Jordan ever played with. I do believe that it is telling that those two players had the worst years of their careers in terms of numbers with Lebron. They were so good that they had to sacrifice for the greater good.

Just about every teammate of Jordan's had their best year when they were playing with Jordan. Why is it that Lebron's guys had to sacrifice and Jordan's guys had their best years?

Does Lebron win 6 championships if he was in Jordan's shoes? No, I don't think he does. What would Scottie do to help Lebron? He couldn't shoot, especially early in his career. He was a good point forward (wait that's Lebron's job) but there is far too much cross-over with him and James.

You see that is a big difference between the two. Jordan could dribble the ball up and create every time if he needed to. He could also play a wing which he normally did. Lebron needs the ball in his hands to be most effective. With needing the ball so much he hurts guys like Irving and Wade who also need the ball constantly. Jordan could post you up, spot up or do whatever you needed. Lebron has gotten much better in this area as well.

If you think that Jordan only wins 2 championships with the Heat's roster in 4 years then you are crazy. I like Lebron, but Jordan took over playoff games and won them single handidly at times. He was unstoppable.