Confederate casualtiy reports for nearly every battle are very incomplete
Federal soldiers are buried in National cemeteries. Few of the burial sites of Confederate soldiers who died inthe Wilderness are known are known. If you're interested, I can provided a picture of Federal soldiers who are about to bury a group of unknown Confederate dead in a common grave just a few days after the fighting of May 5-6, 1864.
Group pictures such as you describe were made in the 20th century, but rarely during the Civil War. If you have an image of this soldier in uniform, you are fortunate indeed. Do you have this soldier's military service file?