[Merlin]

A few of bands you may have never heard of. Machinae Supremacy, practically invented SID metal, and they are one of the greatest bands I've ever had the pleasure of listening to. SID comes from the SID chip installed on a commodore 64, so most of their influences stem from video games, and what not. They are soooo~ amazing though, and they even covered a few famous songs such as Lady Gaga's "Paparazzi," and Brittney Spears' "Gimme More."
Another is Ayreon/Arjen Lucassen/Star One. They're all composed by the same guy. He's created songs from Heavy Metal to Folk Music. There's rarely a song I couldn't reccomend, and most of his albums are concept albums (for those not familiar, an album that is more or less an album wrapped around a story.)
Last, Celldweller. An electronic/rock one man band. This is a man I aspire to be one day. You may have heard his music somewhere, but you couldn't put your finger on it. Well, mostly he's used his tracks in video games, commercials, television shows, etc. so it's no wonder that you may have heard the tune somewhere. One of the more famous ones songs is "Shapeshifter" which was used in a Need For Speed game.