I would have to go with either 5 Jordan's or 5 Lebrons. Jordan is a better player, but I think Lebron may be able to match up a little better with the big and the little guys.
if we are saying the players are being looked at as to how dominant they were in the prime of their career then the Big O and MJ would be far ahead. I dont know that Lebron could shoot well enough to make the others play him honest and has he really shown any post up game? I dont think he would thrive in a full court game full of 5 mj's.. i would put 5 magics over 5 Lebrons..
But as someone said you make it 5 on 5 half court and give Wilt someway to dribble it a bit how would the others stop him in the post?
Durant could be interesting to watch though i dont think he plays much D either.
I think Oscar would be too small for MJ/Lebron. Durant isn't a great defender, and I've never been super impressed with his ball handling. He's got 3-4 inches on Jordan, and about 2 on Lebron, but I think he would have much more trouble scoring on those 2 than the other way around.