If you like shit like Old Crow Medicine Show, Gillian Welch..hell, even Wilco, I highly suggest checking out the whole "Friend of a Friend" record by Dave Rawlings Machine. It's really fucking good
From this list, I only know Wilco. I have such a broad preference for music, I'm always fascinated with stuff that surprises me. So now thanks to you, I am delving into some new shit, thanks.
This is what I am listening to at the moment.
They've managed to re-capture this particular classic sound, not shy to use an array of instruments and impressive close harmony.