For blues, I'd have to include:
   Mississippi John Hurt
   Lightnin' Hopkins
   Jesse Fuller
   Brownie McGhee & Sonny Terry

For Jazz, there are way too many. Personal favorites off the top of my head:
   Gerry Mulligan
   Stanley Turrentine
   Gene Harris
   Stan Getz
   Thelonius Monk
   Carmen McRae
   Ella
   Louis
   George Van Epps
   
Jerry