Here's another fairly important leader to be considered for future versions of the game....
David B. Birney
http://en.wikipedia.org/wiki/David_B._Birney
Another "Political" general, Birney became a division commander after 2nd Bull Run. He commanded a division in the III Corps at Fredricksburg, Chancellorsville, and Gettysburg. By 1864, with the III Corps no longer in existance, he took over command of a division in the II Corps, which he led at The Wilderness, Spotsylvania, and Cold Harbor. After that he received command of the X Corps in the Army of the James.
Birney is known for being pretty unpopular with his men, and for having a couple of controversies with his fellow generals. As a result, "Quick_Angered" or "Dispirited_Leader" might apply.
I wouldn't do anything spectacular with his ratings:
division: 3/1/1
corps: 2/1/1