Dave Mustaine is the razor-edged singer-guitarist who turned getting fired into a lifelong fuel source. To my ears, the story starts in Panic (late 1970s–1981), where those early riffs already sounded like trouble with a pick. From 1981–1983 he was Metallica’s original lead guitarist and co-writer, shaping key early songs before his April 11, 1983 dismissal. Back in Los Angeles he formed Megadeth in 1983 and has fronted it ever since, steering speed, spite, and precision through decades. Side quests like MD.45 (1996) just prove the volume never really drops.