People still think of Bon Scott when they think of AC/DC. He should not be forgotten, of course, nor his earlier work, like My Old Man’s a Groovy Old Man, with the Valentines. But Brian Johnson was lead singer with AC/DC for nearly three times as long, and it is easy to forget how much AC/DC’s sound owes to Johnson and Geordie. If you heard this for example, and didn’t know it, I’d be willing to bet you would guess AC/DC as the artists.