Kris Kristofferson, who wrote it, and of course, Cash, as you mentioned. Those were the only ones I knew of without looking it up but here are others I found that covered it. Quite a few of them, but after all, it is a great song. I also have a friend who does a good job of playing and singing it.
Hank Ballard in a version for Shelby Singleton's briefly lived Silver Fox label
The Mother Hips on the Kristofferson tribute album "Don't Let The Bastards Get You Down;"
punk rock cover band Me First and the Gimme Gimmes on their October 2006 album Love Their Country;
Atlanta-native singer/songwriter Shawn Mullins on his album Soul's Core;
indie rock group Crooked Fingers (2002 EP Reservoir Songs);
the Brassknuckle Boys on their 2001 album, American Bastard.
A version also appears on bluegrass group Bobby Osborne & The Rocky Top X-Press's 2006 album Try a Little Kindness.
Jeff Walker recorded a version of the song for his country cover album "Welcome to Carcass Cuntry".
Mark Lindsay (of Paul Revere & the Raiders fame) released an adult contemporary style recording on his solo album "Arizona".
Frankie Laine recorded the song for his 1978 British album Life is beautiful.
And yet another cover was performed by Alvin Youngblood Hart on the Blue's tribute album to Johnny Cash "Johnny's Blues".
In 1971, Lynn Anderson recorded the song for her album Rose Garden.
In 2006, Trace Adkins recorded a version for the "Songs Of The Year" compilation, available only at Cracker Barrel stores.