Ugh, this totaly goes against my man law. But whatever. The #12 Looks Like You HeavyHeavyLowLow YouInSeries The Fall of Troy The Hills Have Eyes (This one) The Jonbenet Nights Like These Mychildren Mybride
This is quite hard to come up good hardcore, IMO almost an anti-thesis but there are some bands that break the mold: Between the Buried and Me (incredible!) Avenged Sevenfold (their old stuff) The Fall of Troy
I'm not the biggest fan of hardcore, but I like PenKnifeLoveLife, He Is Legend (I guess that's hardcore?) and Dillinger Escape Plan. (I don't even know if that's remotely considered "hardcore") Franny, is the band you mentioned, The Hills Have Eyes, with the guy from Fall Of Troy?
Eh, they're technically inclined but they're still a hardcore band. I like The Number Twelve Looks Like You. Yep.
Hmm, this may be just post-hardcore, I'm not really sure, but Alesana is an amazing band. Across Five Aprils are excellent too.
Terror All That Remains Agnostic Front Some good hardcore bands at the moment.. maybe a bit to heavy for you though
From A Second Story Window Cheap Sex A Wilhelm Scream The Germs Blitzkid The Daughters EDIT: Oh, and Circle Takes The Square.
The Bronx? I don't know whether they're hardcore or not, but they're worth listening to anyway if you haven't already.
If you consider He Is Legend as hardcore you might what to check out These Arms Are Snakes. They sound kind of simular (to me at least). Fall Of Troy are awesome too.