Leadbelly and Robert "sold his soul" Johnson are a good starting place for the blues, but if you want some
country, then look no further than:
http://youtube.com/watch?v=BxJgrjqqOE4 Amos Moses! This is the only video I could find of the original Jerry Reed version, so don't complain about how some nerd set a classic country/blues/whatever song to footage from World of Warcraft. Just minimize the video and listen to the magic.
http://youtube.com/watch?v=o5mRs9agHTs All My Exes Live In Texas (again, weird homemade video.. at least the pedal steel here is good)
http://youtube.com/watch?v=F5BnCEPr7cU Crazy. Originally done by Patsy Cline but Willie Nelson's version is my favorite. Here is Willie, Elvis Costello and Diana Krall singing it.
Aaaaaand thats about as much as I could find on youtube that was decent. NO EDDIE RABBITT.