In reply to Removed User:
Well there's hundreds.
Brokeback Mountain (Ledger, Gyllenhaal, Williams)
The Road to Perdition (Hanks, Newman, Law)
Greg Araki's "Nowhere" (lots of people, admittedly before they were famous)
Until the End of the World (William Hurt, Sam Neill, Jeanne Moreau, Max von Sydow)
Pulp Fiction is not really a mainstream film either...