Gregory Alan Isakov may not write pop songs, but the South Africa-born troubadour has an unmistakable ear for melody. If the gently strummed guitar lines don't get you, watch out for the vocals and lyrics, which often include road stories pulled from his travels across the U.S., where he moved when he was young. You may recognize "Big Black Car" from a McDonald's commercial, but you should know that Isakov donated the money this made him to nonprofits that support sustainable agriculture.