My preceding favourite bands/performers list was too long so I'll simplify it here. Top five favourites from each genre metal or rock. Also I'll list them in order of favourite genre.

Black metal:
1.Crimson Moon.
2.Gorgoroth.
3.Deathspell Omega.
4.Walknut.
5.Taake.

Brutal metal:
1.Origin.
2.Wormed.
3.Suffocation.
4.Aborted.
5.Brain Drill.

Death metal:
1.Morbid Angel.
2.Decrepit Birth.
3.Death.
4.Devourment.
5.Bloodbath.

Thrash metal:
1.Slayer.
2.Megadeth.
3.Anthrax.
4.Metallica.
5.Exodus.

Heavy metal:
1.Black Sabbath.
2.Judas Priest.
3.Iron Maiden.
4.Motley Crue.
5.Motorhead.

Industrial Rock:
1.Marilyn Manson.
2.Nine Inch Nails.
3.Prong.
4.Fear Factory.
5.Static-X.

Progressive rock:
1.Pink Floyd.
2.Yes.
3.Genesis.
4.Jethro Tull.
5.Rick Wakeman.

Hard Rock:
1.Van Halen.
2.AC/DC.
3.Alice Cooper.
4.Def Leppard.
5.Guns N' Roses.

Other performers:
1.Frank Sinatra.
2.Bjork.
3.Rene Dupere.
4.Dean Martin.
5.Victor Borge.

This should suffice to narrow down my favourites in music.