The overlap between American old time music and traditional jazz is huge. In Venn diagrams, the overlap of A with B has lots of stuff in it. Clayton MacMichen of the Skillet Lickers thought of jazz as his "serious" music and couldn't understand why people kept buying those Skillet Licker sides. He wanted to be remembered for his "serious" music. . . sort of like Sir Arthur Sullivan wanting to be remembered for "serious" compositions and not that fluff with Gilbert.
   The complete recordings of Lowe Stokes (also of the Skillet Lickers) are about half jazz and Broadway hits (Take Me To the Land of Jazz, Left All Alone Again Blues, Everybody's Doing It) and half traditional tunes like "Katy Did" and "Take Me Back to Georgia" and Sally Johnson".
   Homer and Jethro did a wonderful album "Playing it Straight" where they demonstrated what great musicians they were (just in case somebody couldn't tell amid the comedy)
   and one of my favorite recordings is that of the Six and Seven-Eighths String Band of New Orleans, who worked out a way of doing Dixieland on stringed instruments: slide guitar as trombone, mandolin as clarinet, guitar and bass. It's wonderful.