Now, I'm not a country listener, but for the most part these aren't country songs. Rather, they have a sound reminscent of the west, spaghetti westerns, wide open spaces, an attitude of independence and individuality.
To keep the post from being too long, I'm only posting YouTube videos for a few of the songs, and including links to the rest; there's also a Spotify playlist of the music down at the bottom. I've also put Amazon buy links for as many of these selections as I could find them for (not my affiliate links; that would have been too much work!) Enjoy!
Johnny Cash, traditional country (Amazon)
Outlaws, country rock (Amazon)
and this retro instrumental version from the 60's, by the Ramrods (with fan-made video): (Amazon)