Well, let's see:
Hellshock - some solid Death/Thrash
Skaven - That is some fairly badass Doom/Death with bad vocals
Buzzoven - Horrible punk noise
Wolfbrigade - decent Heavy/Thrash with bad vocals
Eyehategod - again, crappy groove metal with horrible vocals and not an idea to be seen anywhere.
So I would say one of those is pretty good, two are questionable, and two of them are awful shit that is not metal. Do not confuse heaviness or a simple good guitar tone as equating to "Metal" because they do not. You seem to have a decent ear for tone, and that is important, but it's more important what a band
does with it, and none of these bands seem to be doing much at all.
Now THIS is fucking metal:
http://youtu.be/el0dmyj1LGk