Some OK stuff on that Rolling Stone list actually.
This one's probably pretty good (don't own it, but I like Charlie Poole), though it may be a bit expensive for an entry-level purchase.
Townes Van Zandt is on there as well.
Also, does Ennio Morricone count as "country?" I kinda think so. Composer of westerns, but we're not splicing genes here. Listen to that shit and it'll get you in the mood for gunfights and whatnot.