Thelonious Monk

Thelonious Sphere Monk (October 10, 1917 – February 17, 1982) was an American jazz pianist and composer, considered one of the giants of American music. Monk had a unique improvisational style and made numerous contributions to the standard jazz repertoire, including "Epistrophy", "'Round Midnight", "Blue Monk", "Straight, No Chaser" and "Well, You Needn't". Monk is the second-most recorded jazz composer after Duke Ellington, which is particularly remarkable as Ellington composed over 1,000 songs while Monk wrote about 70.

source: Wikipedia