Charles and William were my Henry's younger brothers. As far as I can tell, they all came to Rush County at nearly the same time-late 1830 after the 1830 census was taken because they all appear on the 1830 Hawkins County, Tenn Census.
I have William in Missouri in 1880 living with his daughter Minerva where he probably died. Do you have anything to confirm that?
I know the Shelton family played an important role in the early Rush County history and I believe I saw several Shelton gravesites at Hannegan Church when I visited the area last fall.