i could make a huge list about this, since most of the stuff i listen to , barely anyone listens to. but most are old-ish and some of them were popular once.
http://www.youtube.com/watch?v=HBMvUpBrWFQ&list=FLJFDr_H9S-lc0rLzN8J4sew&index=43 <--- this guy was pretty popular back in the 80's
http://www.youtube.com/watch?v=bp-qt5gRqA4&list=FLJFDr_H9S-lc0rLzN8J4sew&index=8 <--- same here about these two
http://www.youtube.com/watch?v=NCMm1mJ3DRs&list=FLJFDr_H9S-lc0rLzN8J4sew&index=37 <---- this kind of music is an aquired taste,not everyone likes it, but be sure to listen , its very atmospheric.
http://www.youtube.com/watch?v=Jh9HVvFNOyA <--- Very folklorish type of music
http://www.youtube.com/watch?v=ROnXv7Z7v28&list=FLJFDr_H9S-lc0rLzN8J4sew&index=182 <--- this was popular in the 80's in the Gothic rock scene as well
http://www.youtube.com/watch?v=QEpW4mLHN60&feature=related <---- same as above
http://www.youtube.com/watch?v=SHXOWwqwPDo&list=FLJFDr_H9S-lc0rLzN8J4sew&index=6 <--- this is an OLD heavy Metal band that i don't really know why they don't get much attention , they're fantastic.
http://www.youtube.com/watch?v=wWvfvZTQODE <--- this is one of my favorite songs,be sure to listen to the lyrics.
http://www.youtube.com/watch?v=Bk8W3ysnB7M <--- this is very experimental , you might not like it, but its actually the sound director of the infamous games , you will notice the similarities
http://www.youtube.com/watch?v=MByVLThpfDw&list=FLJFDr_H9S-lc0rLzN8J4sew&index=110 <--- really good Industrial Music, (PS Psycho Mantis included xD ) this kind of music is the reason why "Dubstep" sounds so whimpy ,boring and out of distorsion.
http://www.youtube.com/watch?v=SVNjx4k8mWk <--- same as above, but i think they're pretty popular industrial band, , i don't really know.
http://www.youtube.com/watch?v=EQJUUDsfRek <--- these are one of the best bands of their genre "Doom Metal" , its pretty close to Death metal without the "death howls" but rather more atmospheric and melodic.
http://www.youtube.com/watch?v=NP9tFZlmAXQ&feature=relmfu <--- Ayreon ... is just great, listen to them! , they're not really a band, but rather a collaboration of many known musicians in the Metal genre (EX from Dream Theater , Opeth ...ect) , the result is some great one of the kind music
http://www.youtube.com/watch?v=YY-EOYJQMMY <--- this is symphonic metal at it's best, they're pretty popular though... but the genre itself isn't popular
http://www.youtube.com/watch?v=3i7H1--JxVw&ob=av3e <--- if you guys love Heavy Metal, and wonder "There is no good metal bands anymore!" , well i got bad news for you , you are looking at the wrong place.
