Definitely check out Pendulum! They are a great fusion of rock and electronic music with a smack of industrial for good measure. If you want their more rock influenced stuff, check out their latest album "Immersion".
Trentemøller - The Last Resort Burial - Untrue Both are nice and dark, with great production and are definitely albums to be listened to all the way through, with the lights nice and dim
You could check out Kastra on FB. I found a few of his mashups to be pretty cool. If I were to recommend one, the Madeon - Finale remix he did.
Pendulum was good back then with Hold Your Color and In Silicio. I didn't like Immersion that much. They have since disappeared at the height of their fame or before they became too mainstream? If you like Pendulum, check out: -Enter Shikari http://open.spotify.com/artist/31jvzuB4ikftPQZJwrYfCF -Hadouken! http://open.spotify.com/artist/1369EOxSlL69yV9Yp1nVaR -Celldweller http://open.spotify.com/artist/4BKyei61gtyDFxlKhcvBJJ -The Quemists http://open.spotify.com/artist/2McLd7klWE4UjkPLqqMwLv -Does It Offend You, Yeah? http://open.spotify.com/artist/4bFfSfCBYpFh37ziXCSqUs -The Browning http://open.spotify.com/artist/4DSNcg40nf6T3eNAObq1Lo -Mindless Self Indulgence http://open.spotify.com/artist/5R5MLOQbI4lb7GHYioPqoN -Orgy http://open.spotify.com/artist/4uYwLU7k03RCQSRXGtQGg0
My Life with the Thrill Kill Kult The Devil Does Drugs https://www.youtube.com/watch?v=OUA8JJj_68I Which was also know in Cool World: https://www.youtube.com/watch?v=P-CTR5t7ph4