American pianist and organist
Source (Wikipedia): Bill Doggett

William Ballard Doggett was an American pianist and organist. He began his career playing swing music before transitioning into rhythm and blues. Best known for his instrumental compositions “Honky Tonk” and “Hippy Dippy”, Doggett was a pioneer of rock and roll. He worked with the Ink Spots, Johnny Otis, Wynonie Harris, Ella Fitzgerald, and Louis Jordan.