Byron Berline (1944 to 2021). Brought Texas contest fiddling into bluegrass when he joined Monroe in 1967, then became one of the most recorded fiddlers in American music.
Why this player is listed
Byron Berline 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.