The most lovable and relatable characters always seem to be suicidal
  1. Richie Tenenbaum
    The Royal Tenenbaums
  2. Pat Solitano
    Silver Linings Playbook
  3. Frank Ginsberg
    Little Miss Sunshine
  4. Charlie
    The Perks of Being a Wallflower
  5. Harold
    Harold and Maude
  6. Hamlet
    Suggested by @ChrisK
  7. Lux, Mary, Cecilia, Therese, and Bonnie Lisbon
    Suggested by @TheAnne