4) Bob Marley ($21 million)

Died: May 11, 1981, Age: 36, Cause: Cancer

Marley died of cancer on May 11 1981. His distinctive songwriting and vocal style earned him fans all over the world. Even though this singer, songwriter, musician and guitarist was not a capitalist icon in life, he is becoming quite rich after death. The House of Marley, the Marley Beverage Company and his music is earning him millions each year.