This one doesn't really fit conventional, modern conceptions of genre. Dock Boggs was an Appalachian musician whose voice was, shall we say, not something that modern ears are accustomed to hearing. His banjo technique is something that echoes throughout both blues and bluegrass, and the song has been covered by plenty of musicians across genre boundaries. Was Dock a blues musician? Country? Whatever. He was an Appalachian musician, and that's where the roots of bluegrass are, so I'm using him today. Also, it fits today's theme. Dock Boggs, "Country Blues."