I don't know who's obscure anymore, as I haven't listened to any pop stations in years, none of my friends are "hip," and I don't go to shows/concerts or keep up with the industry. I just heard Yankee Bayonet on Pandora, and really liked it for some reason. I've only heard two or three more of their songs.
She's not a band, but Cat Power just blows me away. I love almost every song I hear from her. But I'm a sucker for girl singers, anyway.