Blind Spot Music
Mainly these labels are associated with the likes of Chris liebing, Monoloc, Speedy J, Tommy four Seven.
to name a few which coincidently the above 4 are all from CLR and in my opinion Pioneers of todays modern deep/dark techno
but all the upcoming deep/dark Techno
producers can be found on these other labels, along with some of the earlier posts below...
I suggest taking a look at beatport and then following one artist, or label to your preference and checking there related labels and remixers etc and then looking them up on google...
a good way to either find labels or send demo's to labels in my opinion
hope this helps