Which musician, Ian Ball or Dave Mustaine, is co-founder of the American metal band Megadeth?
Dave Mustaine:  He is best known as the co-founder, guitarist, lead singer, and primary songwriter of the American thrash metal band Megadeth, and the original lead guitarist of the American thrash metal band Metallica. Ian Ball: Ian Thomas Ball (born 19 October 1975) is an English musician, most notable for being part of the indie rock band Gomez, sharing lead vocals and guitars. Ian Ball:  He is also a member of the 14 piece supergroup Operation Aloha (album). Ian Ball:  along with fellow Gomez member Olly Peacock.
i don't know