I was thinking of Bookburner and The Endless Blockade as well, but then I checked my notes and relistened to Bookburner. I like what they were attempting to do, but I think the exercise was a failure overall. Too much noise and not enough HC, and not enough good noise that got in the way of the average HC homage. I've only heard that one 7", though.
SFN - Itching 2010 - good power-violence from Wisconsin - nice bass tone (MitB) - I hope someone releases a discography CD.
Running for Cover - Dark Well 2008 - smoking power-violence album with a [sometimes] annoying outro - holding down the roots to power-violence with fury and might, but progressively so. You can't go wrong with anything they did. Great band.
Society of Friends - Growing Up and Moving Away LP - this album made my top-10 of the decade (2000-2010) - they were solid to start, but they only got better and better - I'll be listening to this album in 30 years - a bona fide classic.
For my money, The Endless Blockade's benchmark was the Turning Illness into a Weapon album. It feels like they structured it, as in its flow, like a quality noise album. It's unique and very well done in that regard.
If you like Crossed Out, I recommend Su19b. Really the only Crossed Out worship worth spit.
You already know about Apt.213, and while the first 7" is still their best, I recommend their discography CD and everything they've done after it. I probably like them more now than I did when they formed.
Threatener is not power-violence, but for that all-out, balls to the wall energy of Despise You, they're in the same league. Fierce HC thrash of the highest order.