Practically everyone here is familiar with Krautrock's favorite band: the immeasurably talented Can. I can't believe it, but I checked over and over and somehow we don't have a Can thread.
If you're unfamiliar with the avant-garde band, they are an amalgamation of many different styles of music. Years ahead of their time (and certainly much of ours), Can's ethereal throbbing beat has been at the forefront of some of the most perfectly scripted albums. They represent an enormous contribution to music - not just Krautrock - and their influence is enormous and far-reaching at that. I suggest you listen to these three unilaterally praised albums:
Tago Mago
Ege Bamyasi
Future Days