They are not exactly household names today, but Lucius Lamar served as an Associate Justice of the U.S. Supreme Court after the war, as did Horace Lurton and Howell Jackson. All were former Confederates.
Former Confederate Edward White served as the Chief Justice of the U.S. Supreme Court.
Confederate General Joseph Wheeler later served as a Major General of the U.S Army.
Little known today, in the late 1870’s the leadership of both the North and the South made a discreet agreement that the North would go on record as winning the War Between the States, and the South would go on record as winning Reconstruction.
The North was to keep all the monetary profits of the war. The South accepted it because there was little else they could do. And because it would be another five or six generations before materialism became the only thing the average southerner wanted.
Wheeler was appointed a Major General of Volunteers by President McKinley. He became a Brigadier General in the United States Army in June of 1900 and retired from the Army Sept 1900
President Andrew Johnson issued a general pardon on Christmas Day 1868
“Proclamation 179—Granting Full Pardon and Amnesty for the Offense of Treason Against the United States During the Late Civil War”
http://www.presidency.ucsb.edu/ws/?pid=72360