The only Baker gunsmiths I located in TN were
J. E. Bailey. gunsmith. 1861, Nashville [City Dir]. Bailey produced a “gunsmith’s ordnance manual” for the State of Tennessee in 1861 [Samuel Dold Morgan Papers].
Isaac Baker (1757-). gunsmith. He died January 1818 in Greene County, Tennessee. He married Hannah Houston 1780 in Greene County, Tennessee, daughter of James Houston and Agnes Wilson. She was born about 1760 in Augusta County, Virginia, and died in October 1826 in Greene County, Tennessee. Isaac Baker was long thought to be the son of John "Renta" & Elizabeth (Terrill) Baker. In the summer of 2001, DNA tests conducted with a large group of Baker males, proved that there was no connection.
John Renty Baker. Baker probably belongs more to Kentucky than to Tennessee. Baker and his sons were all gunsmiths. They built hand operated machines to cut the rifle barrels. John Renty's father, Robert Baker, built Kentucky rifles. John Renty Baker was known as one of the Long Hunters, spending more than a year at a time in the forests of Tennessee and Kentucky trapping and hunting. John Baker hunted with Daniel Boone's brother-in-law, John Stewart. He lived on the Green River among the Cherokees in what is now Kentucky and made trips down the Cumberland River to Spanish Natchez to sell their furs. After the death of his wife, John Renty Baker became a recluse and lived in a rockhouse near the mouth of Buffalo Creek and died there in 1820. He fathered at least 21 children that are documented [The Conquest of the Old Southwest].
Sellers does not list any one close although that's not surprising as there were few oublished souerces on TN gunsmiths for him to copy.