Would this team be the greatest NBA team of all time?

The reason that it wouldn't work is that there can only be one ball on the court at a time. Wade, James, and Rose all need the ball in their hands to be successful, and Bosh needs to get his shots as well. As far as a pure talent perspective, they would be in the discussion for best teams ever, but as far as a team, the sum of the parts would be much greater than the whole and that does not make for a great team.