Public songbooks
I'm a big fan of the traditional cowboy genre, and these are songs that I've found that fit in the group. If you like them, enjoy. They are mostly pretty easy for guitar or mandolin.
Michael Martin Murphey, Misc. Cowboy, Marty Robbins, Don Edwards, Johnny Cash, Emmylou Harris, Roy Rogers, Red Steagall, Waylon Jennings and Merle Haggard
True Bluegrass and Southern Appalachian Folk songs. Some of the songs are done by people who are not true bluegrass or folk musicians but all of the songs have either folk or Bluegrass roots.
Bill Monroe, Traditional, Ralph Stanley, Bob Dylan, Country Gentlemen, A. P. Carter, Johnny Cash, Townes Van Zandt, Old Crow Medicine Show, Cox Family, Hank Snow...