I would suggest you go to the NPS Soldiers & Sailors Sytstem site and check out the regimental thumbnail sketches for the various units these men were attached which might allow you to eliminate some based on where the units were raised.
George Martin
...............
John T. Scott
Enlisted as a 1st Lieutenant
"A" Co. AR 2nd Mtd Rifles Cavalry
...............
James A. Scott
Enlisted as a Sergeant
"C" Co. AR 4th Infantry
...............
James A. Scott
Enlisted as a Private
"G" Co. AR 36th Infantry
.................
James A. C. Scott
Enlisted as a Sergeant
"H" Co. AR 12th Infantry