The 2000s were an interesting time for heavy music, so keep reading to see our picks for the "Big 4" bands of 2000s metal. Our criteria for the Big 4 of 2000s metal is pretty simple — the band didn't have to have formed in the 2000s, but they had to have peaked during the decade. Scroll to see our picks for the Big 4 of 2000s metal and why they still matter today. The 'Big 4' Bands of 2000s Metal The following four artists were not only the biggest metal groups of the 2000s, but also shaped metal in some way and have had a lasting influence. Gallery Credit: Lauryn Schaffner100 Best Rock and Metal Albums of the 21st Century Loudwire's picks for the best rock and metal albums from 2000 to present.