Jewellee --
The three men mentioned, Haywood C., Enoch O. and Stephen F. Reeves, all have service files with Company "G", 21st Georgia Regiment. I don't see a service file for Ezra W. Reeves, unless the E. W. Reeves in the 4th Georgia Reserves belongs to him. At age 27 in 1860, E. W. Reeves isn't old enough to be a senior reserve.
He's not on the 1870 census that I can find, so he may have died during the war. Actual cause of death is another issue. I would suggest checking the 1864 militia roster for Georgia to see if he happened to be listed. You might also check for a marriage license being issued to Evaline Reeves during this period.
The service files mentioned and any pension applications that may apply can be ordered here.