I find that everything in life has been a disappointment more often than not, except for music. I have a very eclectic taste in music, and am fortunate enough to know many artists of different genres. I was recently introduced to an artist by the name of Bill Callahan, and he is the best I've heard in a while. It sounds like his genre is Folk, but he has a voice that just kind of haunts you in a good way. His voice is like a mixture of Bob Dylan and Tom Petty while his songs are the most relaxing rock I've heard since Pink Floyd, truly incredible stuff.
Another artist I like is Nick Drake, though most of his songs are kind of short. What I love about music is you can never be done discovering it by a long shot. I've liked the WuTang clan forever but only in the past couple of years have I delved deeper into each rapper's solo discography and heard their own shit.
Please post more artists here that are great, but don't mention a mainstream song by a mainstream artist. If you're going to mention a mainstream artist, please mention a more unknown track or a cover they did.