Onryō: http://www.myspace.com/onryokaidan
Lantl
Huh, I've been to that Onryō page several times, and I'd say your hypothesis is correct. I'll see if I can re-find whatever bands I've seen that have been awesome.
Adding to the list:
General Sodomy - http://www.myspace.com/generalsodomy (Total crap project by me and a friend)
Sun of the Elation - http://www.myspace.com/sunoftheelation (Totally amazing project by a friend of mine who loves Earth)
Storms Threaten to Destroy - http://www.myspace.com/stormsthreatentodestroytexas (Local Post-Rock band who is on par with larger acts)
Check all of these out. I'd listen to every one of them regardless of their location, with the exception of General Sodomy.
http://www.myspace.com/ajilvsga
Posting this because I don't want to forget to listen to it later.
edit:
http://www.myspace.com/murmuure
Pretty awesome black metal with electronic bits. I really dig his artwork.
http://www.myspace.com/eboshidori
http://www.myspace.com/garyblasphemer