Some others:

Lisa Gilkyson, who lived south of Santa Fe in the late 70's and 80's, had her own recording studio and played around the area.

Gabby Pahinui, the great Hawaiian guitarist (really not so little known for those in the know)

Clifton Chenier, the great zydeco accordian man (probably too well known to be listed here but I'm doing it to memorialize him cause he was so great) and his brother Cleveland (master of the washboard)

Flaco Jimenez, king of the Norteño squeezebox players--a true master

Freddy Fender (Baldemar Huerta) he mixed country and Norteño and was great. He died recently, RIP.

Jim and Jesse

the Country Gentlemen

Jimmy Rodgers -- the Singing Brakeman, not the papsinger

Peter Rowan

the Greenbriar Boys

Rambling Jack Eliot

Mary McCaslin and Jim Ringer

Utah Phillips