When I think of "under-rated", I am thinking of artists who are not known by a wide audience on the folk scene. Most are singer-songwriters.   Coming to mind are people like Danny Schmidt, Ellis, Antje Duvekot, Pat Wictor, Thea Hopkins, Amy Carol Webb, Tom Breiding, Lea, Joe Jencks, Randall Williams and Anthony Da Costa. Some are starting to recognized, and hopefully we can revist this thread in a year and most will be known!