SEAN BEAN'S NAME IS IN THE CREDITS LIST.
*does happy dance around the room* All I ask is one second of Boromir. An instant of flashback like the one in theatrical TTT would be fine. Just ONE.
And on a related note: Aragorn and Boromir seem to have made up. They are sleeping like this now:
That's Aragorn with his tail draped protectively over Boromir.