This band has a new album coming out soon hear a track off of NPR's new music podcast.
Four part harmonies and great musician ship
https://youtu.be/6gP9ohrbvEY
Here is a full performance.
https://youtu.be/wvAEI0zpO84
http://www.darlingside.com/
http://www.music-news.com/review/UK/13052/Interview/Darlingside