Silverchair

Silverchair became the youngest band to top the Australian chart with their debut single "Tomorrow" in 1994, when members were just 14 years old—a milestone that outperforms #7 Wolfmother's debut album's commercial speed. With over 10 million albums sold, they evolved dramatically from grunge to art rock across five studio albums, each shifting styles more drastically than the typical Australian rock act. Their 1999 album "Neon Ballroom" sold 2 million copies globally, a figure 30% higher than the average Australian rock LP of the era. The band's hiatus in 2011 left a legacy of adaptability; no other act on this list matched their teenage chart dominance or stylistic range, as evidenced by their 2.5 million first-week streams for "Diorama" on release.