Charles Bronson are definately not overrated. Been my favorite band, next to Aus Rotten for years now. But, among some of my favorites are: Charles Bronson, Spazz, Stapled Shut, Despise You, $ylvester $taline, Yacopsae, Infest, etc. Personally speaking, I this the ACxDC demo is very overrated -- Death Spares Not The Tiger/Turtle Power are easily the highlights, but, some of the songs are REAL downers.
Oh, and since we're on powerviolence/thrash, my powerviolence band just played with Rat Byte (Skate Thrash) last night.