The answer to this is Michael Jackson. There are a lot of Micheal Jackson songs that have become very popular. This may not be as popular as Thriller, Heal the World or Billie Jean but this is still one of the hits that Michael when he was still active in his music career.
A lot of people were devastated when Micheal Jackson was reported dead. People suddenly became interested again in all of his songs. They purchased and watched DVDs about his past concerts and purchased his different songs. Even in his death, people still knew of him. There are also some songs that were produced after his death.