I caught a stream of a King Crimson show from the 80s and it gave me a whole new appreciation for this band. I've tried listening to them before because I always hear them referenced as an enormous influence for all sorts of bands, but I never heard anything that hooked me until Beat and Discipline. Both albums have been on repeat for a couple weeks now.
That was the best lineup to me with Belew/Levin/Bufford. They were funky, abstract, No Wavey, and had a lot of polyrhythm influences. Check out Three of a Perfect Pair to complete their 80s trilogy, and I like their 1994 semi reunion album Thrakk where 3/4 (minus Bufford) were back in a six man version of the band.
I'm guessing you heard about the Beat Tour Belew and Levin did with Steve Vai and Danny Carey this year? Shame Bufford doesn't really tour anymore but he said it best, he doesn't want to be waiting around airports dealing with flight delays and luggage issues. He's in his 70s.
Red from the mid-70s is another great album by them, but as a trio with Fripp/Bufford/John Wheton on bass and singing (he would be best known as the main dude in Asia). It's more of a hard rock record, still just as good (less quirky) than the 80s lineup.