Ahhhhhh... EDM... now this is my stuff.
OK, well, sorta. I'm more partial to the light, happy stuff.
But what I always do if I'm looking for more music of a certain style is I look for more songs by or remixed by that producer. So I'd first suggest looking for more 80kidz, MSTRKRFT, and whatever else you like.
But seeing how you seem to like more of the darker electro house, perhaps you'd like Wideboys? I'm not too experienced with electro, so its sorta a toss up. They may be a bit more commercial-y than you like.
I'm not sure how much you may like 2-4 Grooves, but they're one of my personal favorites...
idk... I only really follow Mental Madness Records and Zooland Reocrdas, and they're both kind of commercial...
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its still not all too dark or hardcore, but I'm gonna throw DJs From Mars out there too.