1972:
1.
Roxy Music -
Roxy Music

To me, this did for the 70s what The Velvet Underground & Nico did for the 60s, to a lesser extent. I think Andy Mackay put it best: "we certainly didn’t invent eclecticism but we did say and prove that rock 'n' roll could accommodate - well, anything really".
2.
Klaus Schulze -
Irrlicht

This is some of the most beautiful electronic music I have ever heard. The soundscapes Schulze is able to create (in 1972, no less) are absolutely mesmerizing. A must-listen.
3.
Neu! -
Neu!

This still has a lasting impact on music. Neu!'s debut was far beyond its time, and if the first track "Hallogallo" doesn't mesmerize you I don't know what to say.
4.
Can -
Ege Bamyasi

Says something about Can that my third favorite release of theirs is still nearly perfect in my eyes. Not quite as good as Future Days or Tago Mago, but absolutely brilliant nonetheless. There are few bands with so much good material.