One of the problems with identifying a trees based on bark is some trees like cherry can go through different bark phases depending on age, location, sun light, soil conditions etc. The op's bark isn't like any of the native persimmon trees that I've seen in TN, but this could be do to bark phase. For anyone interested, a good book on this is "Bark - A Field Guide to the Trees of the Northwest" by Michael Wojtech. Only wish that he'd expand this book for tree in other areas of the country.