Mentioning Traditional Cajun music inevitably unearths a few 'forgotten' names. I can remember these:
Harry Choates, whose "Jolie Blonde" was the first national 'Cajun' hit record.
Rufus Thibodeaux, a Cajun guitar and fiddle player who worked with Jimmie C. Newman, notably on "Cry, Cry Darling", and as a session musician (backing such artists as Lefty Frizzell, George Jones, Jim Reeves, etc.).
Iry LeJeune: "Evangeline Special".
Nathan Abshire: "Pine Grove Blues".
...and, of course, Joseph Falcon: "Lafayette".
...also Jimmie C. Newman, Jo-el Sonnier and Doug Kershaw (already submitted).
Interestingly, Lucinda Williams included two songs, "Lafayette" and "Louisiana Man" (both original self-penned songs) on her 1980 album "Happy Woman Blues". And excellent they are, too!