Megadeth Most Commercially Successful

As one of the most commercially successful of all heavy metal bands, Megadeth has sold more than 20 million albums worldwide, with six consecutive albums being certified platinum in the USA. The band has also received great critical acclaim with seven consecutive Grammy nominations for Best Metal Performance. In the band's 24 active years, Megadeth has had 20 official members, with Dave Mustaine remaining as the driving force, main songwriter, and sole original member following the end of his musical partnership with David Ellefson in 2002, due to personal disagreements. Megadeth is hailed as one of the bands among the "Big Four of Thrash," along with Metallica, Slayer, and Anthrax, who were responsible for creating and popularizing the genre in the 1980s.
Sources www.megadeth.com & www.wikipedia.org