My favourite band, hands down, is Kagrra,. Isshi's vocals are calming, and the music is always well written. Whenever they would release an album, it was like they created a new world to get lost in - and still to this day, I can't find a single song that I could care less for.
My favourite artist in general is John K. Samson. He's a gifted lyricist; he captures what we want to say but can't. As said by Craig Finn of The Hold Steady "[...] His songs are beautiful, brutal, honest and comforting, all at the same time."