I did a little digging on your Harless Marcom. He and his wife, Loretta Pauline Orr, had one son, Lowell James Marcom, b. 23 Oct 1938, d. Aug 1966 but I don't know where..I do know that it wasn't in Texas, but his SS # was issued in Texas. And according to the SS Death Index, Harless did died in Amarillo, but it was Randall County, not Potter. Amarillo is half Potter/half Randall County. Don't ask me why; I live in Canyon, which is entirely in Randall County. Lowell was born in Potter County.
I wish I could have given you more pleasant news. If you wish, I can call the cemeteries on Friday and see what I can do for you.