A standout debut from one of the first supergroups, Stephen Stills shows how underrated of a songwriter he is with songs like Suite: Judy Blue Eyes and Helplessly Hoping.
Adding on to an already 10/10 debut from the first 3, Neil Young is basically the missing piece for this group. Adding Neil Young gave the group a more aggressive flare that I think set them aside from just about every other supergroup in the 70s, and helped revolutionize what the genre of folk rock could be.