SS has definitely written a lot of good music.
My favorite SS track is "4 and 20" from the "Deja Vu" album. It’s a simple, haunting song written by SS and performed by him exclusively. When he played it for CN & Y, they were awe-struck, saying it was perfect as-is and no contribution from them could make it any better, so it remained a rare solo effort on a CSN & Y album.
It was a favorite of mine when it was released and remains so today.