Hank Williams III, "Cocaine Blues." From the album Risin' Outlaw (1999). There's probably not a more appropriate Johnny Cash tune for III to cover. It's a song that already had much of the bad attitude that III brings to it. I'll choose Cash's version every time (as III himself probably would, too), but this one's very faithful and pretty solid.
Dash Rip Rock, "Jolie." From the album Not of This World (1991). This is the kind of song that showcases what Dash Rip Rock does best. It's a fairly sincere love song, but it's very uptempo and high energy. It's a very country-flavored tune, but there are also influences of punk rock and Cajun music in it. It still baffles me why Dash never made it bigger than they did.
Stevie Ray Vaughan, "The House is Rockin'." From the album In Step (1989). This is probably the best SRV party tune. If the house isn't rocking, it will be by the time this song is over.
Waylon Jennings and Willie Nelson, "Mammas Don't Let Your Babies Grow Up to be Cowboys." From the album Waylon & Willie (1978). What can you say about this song? I can remember singing it along with the stereo at my grandparents' house when I was just a small kid. It's not one of my favorites from Waylon and Willie now, but it's still a classic.
The Ramones, "Chain Saw." From the album The Ramones (1976). Classic Ramones with its bopping melody and totally appropriate chainsaw guitars. And Joey Ramone singing about the Texas Chainsaw "massacree." Classic fun.