Seth Putnam

The late frontman of the grindcore band Anal Cunt.
Although the band was known for their offensive lyrics and obscene logo (the A {in "Anal"} looked like an ass while the C {in "Cunt"} looked like a vulva), he pretty much was a nice person and was in powerviolence band Siege, filling in for frontman Kevin Mahoney after he had originally retired from Siege (and music in general).