Question: what bands are heavy metal?
Answer: Metallica. Metallica fans love to complain.
Dream Theater. Dream Theater is the perfect marriage of prog rock and heavy metal. ... 
Black Sabbath. Black Sabbath did heavy metal first, and they may have done it best. ... 
Iron Maiden. There's almost no such thing as a casual Iron Maiden fan. ... 
Slayer. ... 
Megadeth. ... 
Judas Priest. ... 
Led Zeppelin. ...