One of the very first giants of jazz, Jelly Roll Morton did himself a lot of harm posthumously by exaggerating his worth, claiming to have invented jazz in 1902. Morton's accomplishments as an early innovator are so vast that he did not really need to stretch the truth.
Morton was jazz's first great composer, writing such songs as "King Porter Stomp," "Grandpa's Spells," "Wolverine Blues," "The Pearls," "Mr. Jelly Roll," "Shreveport Stomp," "Milenburg Joys," "Black Bottom Stomp," "The Chant," "Original Jelly Roll Blues," "Doctor Jazz," "Wild Man Blues," "Winin' Boy Blues," "I...