I don’t really know what constitutes “folk”, to be honest.
But I like a lot of indie / country stuff:
Chuck Brodsky
Richard Shindell
Shawn Mullins
Lumineers
Metric (their acoustic stuff, especially)
Stan Rogers, and his brother Garnet, who has taken his Canadian maritime / country mantle since Stan’s premature death
Iris Dement
Bon Iver / Justin Vernon (I’d say a guy who wintered alone in the Wisconsin countryside to nurse a broken heart – and compose the songs to do it with – could count as “folk”) “Wisconsin” is my favorite of many good songs from that album.
I like the two versions of “Where the Hell is Matt?” that I’ve seen so far. The accompanying music may not be “folk”, precisely, but a guy who dances with kids and strangers from around the world must be the very personification of the term.