Still within the 'rock' end of the spectrum but my this is my personal favourite band with 'dark' music that frequent the forum;
 
http://www.distant-towers.com/begin.htm
 
Great advice from 'dubdisciple' btw..you will find a handful of people here who will give you a hard time just because of the word 'rap', but by and large most people are friendly and open-minded.

No Dark side here, though I have been accused of writing dark sounds.  Not that much into rap though.

thanks dub. That would be much appreciated. And thanks for sending me that youtube video of the rapper. He is talented. I liked the song.