I haven't seen lotsa Shia, but I heard he was good in American Honey.
I stayed away from young actors on my list. I thought about Kirsten Stewart, Brie Larsson, and Emma Stone.
My favorite of Philip Seymour Hoffman's roles was in The Master. 5 seconds into his screentime I knew that this was something I'd never seen from him before.
Joaquin Pheonix deserves to be on the list too.
Will have to check this out.