Papa John Creach (1917 to 1994). Blues fiddler with Jefferson Airplane.
Why this player is listed
Papa John Creach appears in the Play Bluegrass guide to notable fiddle players, which collects contest champions, bluegrass fiddlers, Canadian fiddlers, judges, and departed legends tied to the tradition.
More fiddle context
For the larger list, start with the big list of fiddle players. For the style itself, read the guide to bluegrass fiddle.