Like the "drunk" U.S. Grant? Or "madman" Sherman?
Actually, neither of those assertions is sufficiently provable. Grant allegations have been blown way out of both proportion and context. Sherman loved, and had family, in the South. He was an accomplished General who was understandably hated by his victims. A more honestly curious historical search might alter your preconceptions.
Speaking of context, this is the opinion of a life-long, history loving, getting long-in-the-tooth, yankee southern sympathizer.