Tré Cool is why Travis Barker is off this list. He's simply more prolific than Barker — just listen to the rolls and explosive soloing on "Burnout" for a sample. After joining Green Day in 1991, Cool quickly made bassist Mike Dirnt sound even better than he was; the unspoken duty of any proper punk drummer. Soon, Cool would become the band's shot of adrenaline during a show. But more than just energy, Cool's got chops (which, unlike Barker, he never overindulges in). Through the years, he's gone from lightning fast to stadium-ready power and clarity — showcased masterfully on 2004's American Idiot. But both in terms of talent and wackiness, Cool will always be Green Day's freak.