Malcolm John Rebennack, Jr. (November 20, 1941 – June 6, 2019), better known by his stage name Dr. John, was an American singer, songwriter and pianist. His music combined New Orleans blues, jazz, R&B, soul and funk. Active as a session musician from the late 1950s until his death, he gained a following in the late 1960s after the release of his album Gris-Gris (1968) and his appearance at the Bath Festival of Blues and Progressive Music (1970). He typically performed a lively, theatrical stage show inspired by medicine shows, Mardi Gras costumes, and voodoo ceremonies.
https://en.wikipedia.org/wiki/Dr._John