Under the generally acknowledged great Civil War commanders there is a layer of great Civil War technocrats who tend to be almost as well known, e.g. Gorgas, Dahlgren, Meigs, Ellet, etc.I don't think Jonathan Letterman, M.D., is well known in this class. I think of him as a gift to the Northern wounded, part of the immense circle of talent recognized and recruited by McClellan. The GBM-Letterman relationship should raise McClellan a notch in the most hostile quarters, I think.
Today's Army has the decency to recognize Letterman above and beyond what Centennial historiography allows, and I commend their material to you.
One fundemental difference between Meade and McClellan was thrown into stark relief by their management of Letterman. See here for material damning to Meade.
Meanwhile, I simply cannot imagine being Southern and wounded without a Letterman or a McClellan to look after me.