My favorite is Bloodshot Records. I can honestly say I’ve never been disappointed with any disc I’ve listened to with their label on it.
From their philosophy statement:
I’ve become assured enough of their ability to pick good music that I’d be comfortable ordering anything from them without hearing it first. Case in point is the terrific Alejandro Escovedo disc I’ve got spinning right now. It’s an interesting mix of Tejano, Rock and even some country.