As for The Dead, they never did anything for me. I don't hate them, they're just kinda "meh" to me. But I agree that AB and WMD are probably their studio peak as albums (they cut better individual songs later, but I've already mentioned them).
Back In Black is like Thriller - it's so massive that it's difficult to assess it properly anymore.
My brother is two years younger than I am (we were both born in the early/mid-60s) and he's the one who turned me onto AC/DC when Highway To Hell came out (I was a funkateer in those days, as mainstream rock seemed played out to me). Then I was able to backtrack through earlier Bon-era records. AC/DC had gotten pretty popular, but they one among many. Then Scott died.
Then Back In Black came out. That record hit like a nuclear bomb. There was nothing like it on the radio. And then there was a LOT like it. Queen ripped off the title song, along with Chic's "Good Times", and combined them into "Another One Bites The Dust". Most of the hair bands spent the decade rewriting "You Shook Me" or "Shoot To Thrill".
AC/DC is a one-note band. But what a note.