AC/DC rhythm guitarist Malcolm Young may have been overshadowed on stage by the cartoonish antics of his schoolboy uniform-clad younger brother Angus. But on record, his disciplined rock and roll riffs undeniably shaped the sound that would propel the band into superstardom. Young was more than content to allow his sibling take the limelight, rarely giving interviews during a 40-year career in which he established himself as one of rock's ultimate strong and silent figures. Instead, he preferred for his beloved Gretsch Jet Firebird guitar to do the talking on a string of seminal multi-million selling albums -- including the classics <i>Highway To Hell</i> and <i>Back In Black</i> -- which showcased an intelligent understanding of volume and rather unusually for such a high-octane band, a fondness for clarity, spaciousness and restraint. Sadly, the onset of dementia cut short his AC/DC career in 2014. But cited as a key influence on everyone from Metallica's James Hetfield to Guns N' Roses' Izzy Stradlin, few axemen have made such a long-lasting impression.