- The Lewis Sisters -- The Lone Bellow
- The Lonesome Pine Fiddlers -- The Lovin 44's
- The Lowcountry Boil Bluegrass Band -- The Marshall Tucker Band
- The Martins -- The McKameys
- The McKrells -- The Mighty Lumberhorn
- The Mighty One -- The Moody Brothers
- The Morris Brothers -- The Naked Cowboy
- The Narrators -- The Nashville String Machine
- The Nashville Voices -- The Newport "House" Band
- The Nickel Slots -- The Oklahoma City Philharmonic
- The Oklahoma Twisters -- The Original Smokey River Boys
- The Original Snakeskins -- The Parsons
- The Patchouli Brothers -- The Piners