Easy here.

Band name: "The Berzerkers"

Genre: Thrash Metal

Hit Single: "Valhalla"

Members:
Mikko Rashford - Lead Vocals
Jeff Larsson - Backup Vocals, Lead Guitar
Tommy Tightpants - Backup Vocals, Bass
Jay O'Neil - Drums
Pope Coswi - Backup Vocals, Rhythm Guitar

Career Length:
Pope gets addicted to cocaine early into the band's lifespan, and the band is forced to part ways with him. He dies soon after. Heartbroken by this loss, Rashford and Larsson get into repeated fights over who is more talented lyrically. The band breaks up, but not until after releasing an album that debuts at number 10 on the Top 100. Tommy retires to a farm in upstate New York, never to be seen in the public eye again.