Crosby, Stills, Nash, and occasionally Young, were an awesome group of singers, musicians, but more critically, song writers. Says enough you hear the first note on Ohio, Southern Cross, or Wasted on the Way, you immediately recall all the song lyrics. Says enough.
With the mileage he's been though, he had a long run. Thankfully he managed to defeat his addictions and continue on doing what he did best, entertaining people with awesome music.
Can't think of a better song to send him off with. RIP David Crosby.