If you want instrumental, 'Behold... The Arctopus' are friggin' amazing... www.myspace.com/beholdthearctopus
Obviously also Spastic Ink...
With singing, none really compare with Oyvind's voice IMO, closest probably are the previously mentioned Twisted Into Form, then there's the obviously influential bands of Watchtower and Psychotic Walz...
"From the past"????? Have you been paying attention?
Let me introduce myself. I'm the webmaster for the Official Mekong Delta Thrash Pages.
Mekong Delta has been active again since the end of 2005. Check out the Official Mekong Delta site. New album due for release on AFM Records on the 24th of August 2007!!!!