Sorry to hear that Malcolm Young of AC/DC has died after suffering from dementia in recent years. My aunt just just died with a similar condition.
Malcolm tended to hang back in the shadows whilst brother Angus took the spotlight, but he was a vital part of the AC/DC sound.
The band were formed in 1973 and survived the death of their original singer Bon Scott. I've never seen them live, but their shows look epic and they are amongst the biggest grossing touring bands. They always gave the fans what they wanted, good old rock and roll.
RIP Malcolm.