My first experience and pretty much only experience with Petert La Farge was after his death. "The Ballad of Ira Hayes" showing up on a Pat Sky album. Johnny Cash's recording being about the same time. And then Buffy Ste. Marie doing "As Long as the Grass Shall Grow". Both songs always had foot notes with The Late Peter La Farge, author. I remeber thinking her was a writer with a clearly defined mission, that of Indian Rights.
As Spaw says there are so many we hear about but never hear. Michael Strange and Will McLean come immediately to mind for me. Beyond Mc Lean's "Osceola's Last Words" I know nothing of his music but would love to know more.