OMG, I'd never heard that Richie Havens before. Fantastic. I love that first CSNY album.
Where can I go from that one? Let's see, covers from that first CSNY album... Miles Davis did a long cover version of "Guinnevere" that was released on the "Circle in the Round" album. You know, I like it better than Crosby apparently did, but it's too diffuse for me to really put here. I'll tell you a cover he did that I actually do like a lot though - his cover of Minnie Riperton's "Loving You" in '75. It's a really oblique version but really beautiful IMO.