William Colt MacDonald and Luke Short were another two I loved.
Shoot Him On Sight was my favorite by William Colt MacDonald.
http://mysteryfile.com/blog/?p=20940
Unfortunately it and most of his books are not available as eBooks.
Powder Smoke, The Battle at Three Cross and The Red Raider are the only ones I know that are available as eBooks.
William Colt MacDonald
https://www.fantasticfiction.com/m/william-colt-macdonald/
Luke Short
https://www.fantasticfiction.com/s/luke-short/
Apache