Not only was RE Lee a great general, he was a fine man.
I told my Grankids that about Robert E. Lee and Stonewall Jackson.
Lee was a great general when he worked out his plans until Longstreet vetted them. When he hatched something and ran with it despite holes percieved by Longstreet, not so much.
As long as he worked within the framework of being the leader of a competent staff, he was good. But he was not a good solo planner.