Complex sentence: Jarrett ran or worked for a number of Nashville soul, blues, and gospel labels (Champion, Calvert, Cherokee, Poncello, T-Jaye and others), producing artists such as Christine Kittrell, The Fairfield Four, Roscoe Shelton, and The Avons.
Split into simpler sentences: Jarrett ran or worked for a number of Nashville soul, blues, and gospel labels, including Champion, Calvert, Cherokee, Poncello, and T-Jaye. He produced for artists such as Christine Kittrell, The Fairfield Four, Roscoe Shelton, and The Avons.