"Ok, the island needed Jack to save Ben. I can agree with that. But I think the island needed all of the Losties (for whatever reason) and they all needed the island (for whatever reason). It's not like the island needed Jack and everybody >>"

The Island needed Jack but wanted Locke

everyone on the plane has a specific role for the Island from Clare
to Bernard the dentist

Redemption forgiveness and rising to the occasion which is what Charlie did by his death

every door opens to the next
each with different possibilities for redemption Hero/Heroine status

Charlie went from Everyman status to rockstardom

from whining junkie to Hero { although it appears his death may cause multiple MORE deaths ..Des lived cuz of Charlie and we look for Clare and Aoran to leave safely}