Conversation so far:
When did the Byrds form with Gene Clark?
1964
Who were the original members of the Byrds with Gene Clark?
Original members. Roger McGuinn, Gene Clark, David Crosby, Michael Clarke, Chris Hillman
Anybody else a member of the band Byrds besides the original members?
Subsequent members. Kevin Kelley. Gram Parsons. Clarence White. Gene Parsons. John York. Skip Battin.
What was Gene Clark role in the band the Byrds?
Clark wrote or co-wrote many of the Byrds' best-known originals from their first three albums.

Question: What songs were those?
Self-contained rewrite: What songs were those that Gene Clark wrote or co-wrote which later became many of the Byrd's best-known originals from their first three albums?