Tommy Jackson (1926 to 1979). The defining Nashville session fiddler of the 1950s. His square dance records taught thousands of fiddlers the standards.
Why this player is listed
Tommy Jackson 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.