At two ends of the rock sonic spectrum I nominate Def Leppard's Hysteria, and GnR's Appetite For Destruction.
One is delicately and intensively crafted to be to rock music, Thriller was to pop. Every phrase, every note, every tone, every eq setting poured over to the nth degree to sound utterly perfect to the ears.
The other, hashed out in a few days, but with an energy and rawness that smacks you round the head like a wet fish. Cutting guitars, punchy melodic bass, visceral vocal. But underneath it, well crafted songwriting. It still sounds as fresh today as it did over 20 years ago.
Odd thing is, Appetite knocked Hysteria off the number one spot. Both perfect rock albums that one could argue mark the moment it all changed. One marking the pinnacle of the perfectly produced 80s studio sound, the other the incoming back to basics rawness of the 90s. And I love them both.
PS - I might also add Queen II. An absolute aural delight in every way, laying down the foundation of what would become the signature Queen sound. Complex, dynamic song structures, strong melodies, multi layered vocals, huge walls of guitars and massive sounding drums and bass.