Which artist would you say is the most underrated artist of all time?

[King Belieal]

Music has a profound effect on the minds of people and it is a powerful tool. And throughout history, we have had so many incredible music artists. However, there are some artists that didn't get the recognition they deserved.

Which artist would you say has been criminally underrated? For me, I think J Cole deserves to be more rated than he has been and currently is. Man is a king of story telling and social conscious songs.