There are two artists sharing this name;

1) The Highwaymen was an American country music supergroup, composed of four of the genre’s biggest artists, known for their pioneering influence on the outlaw country subgenre: Johnny Cash, Waylon Jennings, Willie Nelson, and Kris Kristofferson. Active between 1985 and 1995, the group recorded three major label albums as The Highwaymen: two on Columbia Records and one for Liberty Records. Their Columbia works produced three chart singles, including the number one “Highwayman” in 1985.