LightSpectra
me autem minui
The point I made might be at a tangent to your question but is still pertinent. Longstreet, the man you put forward as the war's best commander hardly shone when he got his opportunity for independent command either, did that cause you to rate him as moderately competent too, or dismiss it since as a corps commander he generally operated under another general's supervision?
I don't think Longstreet had the charisma or energy to be a commander-in-chief. That means Lee is superior in this regard, but that's not a compliment to Lee, that's only telling of the fact that the Confederate Army didn't have anybody exceedingly competent at the helm. I praise Longstreet for having a keen tactical sense and highly innovative staff system (I recently read an article that compared Longstreet to Moltke).
Part of an army commanders job is to understand his immediate subordinate's abilities and utilise them to achieve his goals, so I don't see Lee using Longstreet's talents and advice as a negative point to Lee's generalship but a positive one. Saying Lee wasn't very talented without Longstreet and Jackson is like saying that Napoleon wasn't much good without Davout or Lannes.
Knowing which subordinates are worth listening to, and when to do so, is a positive trait. But there's still a place to assign credit to various levels in the hierarchy, and we're able to do that because we have an in-depth knowledge via memoirs of whose ideas were what. If commander X wins every battle, then his Chief of Staff commander Y departs, and then X loses every battle, it's (except in rare circumstance) rather evident that Y was the one running the show. Such is an exaggeration of what I think of Lee and Jackson/Longstreet, but is it not a mark against Lee that he disregarded Longstreet's advice about engaging at Gettysburg and a giant assault on the third day, to which then Longstreet resigned in frustration, to which then Lee performed markedly poorer from that point out?