I personally don't think the confederacy got the cream of officers, and if I'm not mistaken, I think that's what you're getting at. They got some good ones and they got some bad ones and they got a bunch in between. They only got one who demonstrated he could successfully command an army, which was probably the most difficult job an army officer could have. Where the US Army beat them was in bench strength. The US was able to develop officers who could successfully command armies. They all might not have been highly regarded at the beginning of the war, but they proved themselves during the war. Who, in 1861, thought Grant would amount to anything? He couldn't even get an audience with McClellan or anyone else in Washington. Fortunately, he was given the time to develop his abilities in the West because most of the eyes were on the East. Grant, after the war, speculated that McClellan would have been highly successful had he had time in the West to develop his abilities.