Roster of Confederate Soldiers, 1861-1865 shows:

Hall, Benjamin P. TN 46th Inf.
Hall, Benjamin P. TN 9th (Ward's) Cav. Co.G Cpl.

Probably the same person.

Hall, J.L. TN 45th Inf. Co.A
Hall, J.L. TN 50th Inf. Co.D Cpl.
Hall, J.L. TN 9th Inf. Co.F Capt.

Might be the same person.

Hall, John L. TN 1st Cav. Co.I

Just to give you an idea as to how tough it might be to find the right one:

Hall, John TN 1st Hvy.Arty.
Hall, John TN 21st (Carter's) Cav. Co.G
Hall, John TN 22nd Inf. Co.C
Hall, John TN 25th Inf.
Hall, John TN 2nd (Robison's) Inf. Co.H
Hall, John TN 32nd Inf. Co.B
Hall, John TN 35th Inf. 1st Co.I
Hall, John TN 3rd (Forrest's) Cav. Co.D Sgt.
Hall, John TN 46th Inf. Co.B
Hall, John TN 59th Mtd.Inf. Co.G 1st Lt.
Hall, John TN 60th Mtd.Inf. Co.I
Hall, John TN 61st Mtd.Inf. Co.B
Hall, John TN 6th Inf.
Hall, John TN 7th Inf. Co.B
Hall, John TN 8th (Smith's) Cav. Co.I
Hall, John TN 9th (Ward's) Cav. Co.G