(1) Grant = 54,303 (duration of war, total)
(2) McClellan = 40,647 (one year only)
(3) WT Sherman = 29,220 (duration)
(4) Rosecrans = 28,695 (duration)
(5) Meade = 23,318 (until Grant's arrival, 1864)
(6) Hooker = 10,746 (duration)
(1) McClellan = +11,216 (more inflicted than sustained - one year)
(2) Sherman = +9,051 (duration of war)
(3) Rosecrans = +5,860 (duration)
(4) Meade = +4,362 (until Grant's arrival, 1864)
(5) Grant = -27,009 (more sustained than inflicted - duration of war)
(1) R.E. Lee = +13,560 (more inflicted than sustained, total for duration)
(2) McClellan = +11,216 (more inflicted than sustained - 1862 only)
(3) J. Johnston = +1,446 (1862-1865, total for duration)
(4) B. Bragg = -2,087 (more sustained than inflicted - total for duration)
*Battles ordered by McClellan as general-in-chief that were not fought in his own theatre of war have been excluded from this data. Also West Virginia has been excluded.
All information is absolute: there has been no scaling or proportionality to benefit McClellan's shorter army career. McClellan's totals are for 1862 only.
Other generals' data is for the duration of the war. Grant's numbers do not include friendly and enemy casualties in the Petersburg siege, due to quality of data available. They do not include surrendered troops because this is combat data. Meade's numbers do not include events after Grant joined him in the field.
Source: McWhiney and Jamieson, Attack and Die