Mumford & Sons
I like Mumford & Sons and I listen to their songs in my playlist.
Their music is unique, folk rock, and easy to listen to and appreciate. I know they are not mainstream and I have yet to meet someone I know who listens to their songs.
Their musical instruments are quite unique too. I can probably spot a cello tuner but not be able to identify a dobro. Can you?
I really hope they will win the Grammy awards nominations they got: Album of the Year for Babel, Best Rock Performance, and Best Rock Song.