Benjamin Zhang Bin -
Though not a storyboard, I find this quite relevant to what I have been doing, as the frames manage to capture a moment and movement(through the streaks of colour and brush strokes etc). The compositions are quite striking too and seem quite cinematographic, and are the type of illustrations I should perhaps be attempting, since the quality is so high.
(These are links to more images by Benjamin Zhang Bin)
http://www.comicvine.com/benjamin-zhang-bin/26-57301/artwork/108-294296/benjamin_82/105-925500/ and http://www.comicvine.com/benjamin-zhang-bin/26-57301/artwork/108-294296/benjamin_84/105-925503/