Marco Mazzoni is an amazing Italian artist, who was born in 1982. He uses almost exclusively colored pencils in his work. Mazzoni can tend to be both light and heavy handed. In really dark areas where one might think he is using ink, he is actually utilizing the burnishing technique, or pressing down really hard. Here is a link to his tumblr, I highly recommend checking him out if you think colored pencil is a very limited medium, or you simply like colored pencil drawings.