There were hundreds of Union generals.
Some of the more famous major generals were
George McClellan
William T. Sherman
Philip Sheridan
John C. Fremont
George Meade
William Averell
James G. Blunt
Don Carlos Buell
John Buford
Ambrose Burnside
Benjamin Butler
George A. Custer
James A. Garfield
Henry Halleck
Scott Hancock
Joe Hooker
John Pope
William Rosecrans
John M. Schofield
Carl Schurz
Winfield Scott
George Thomas
See the related links for the rest of them and pictures.
The answer is Nathaniel Greene is one of his best Generals.
Grant and Sherman
Grant Meade Meigs
because of you
The South had better generals than the North did at the time.
The North was invading an unfamiliar territory and most of the generals were inexperienced or inept.
There were several British Generals in North America prior to independence.
The North. But the South had managed to cream-off some of the best of them.
Lee for the South versus Meade for the North
The major and most prominent generals in the US Civil War can be narrowed down to two generals. For the South the prominent general was Robert E. Lee. For the North it would be US Grant.
They both fought for control of North Africa .
North- Maj. Gen. William Rosecrans South- Gen. Braxton Bragg