A collection of some free, legal downloads of dark music I have found.
Zynik 14 - Gottkomplex
Here is a full-length album from Zynik 14. They say they are an EBM band, but they are not exactly old school so it may be a bit hard to hear. All the basic elements of the beat, the bass and the barking singing are there, but also a lot of other things so even if you don't like strict EBM it may be worth a listen.