I live close to LaGrange, and would be glad to run by the cemetery there to check for a head stone.
I know there are graves there from 1863 and 1864 so it may be a possibility.
Also there is a Confederate Graves Database for soldiers buried in Georgia. I will get the web adress and post it here. The list is a long way from complete, but I know Troup County is very close to being finished.
Would Newnan also be a possibility?? There is a large Confederate Cemetery there, I will be up that way soon, will check it also.