Who is the best metal band that ever played?

Top 30 In My Opinion:

1.Black Sabbath

2.Judas Priest

3.Iron Maiden

4.Metallica

5.Motorhead

6.Dio

7.Megadeth

8.Slayer

9.Accept

10.Death

11.Pantera

12.Ozzy Osbourne

13.Celtic Frost

14.Rainbow

15.Mercyful Fate

16.Dream Theater

17.Helloween

18.Anthrax

19.King Diamond

20.Queensryche

21.Venom

22.Manowar

23.Alice In Chains

24.Fate's Warning

25.Testament

26.Sepultura

27.Bathory

28.Mayhem

29.Opeth

30.Immortal