Christian Bale, Robert De Niro, James Stewart, Jason Alexander, Steve Carell, Rainn Wilson, Heath Ledger, Anthony Hopkins, Kevin Spacey, Grucho Marx, Charlie Chaplin, Rooney Mara, Sean Connery, Jack Nicholson, Edward Norton, Brad Pitt (mostly before 2000, but some of his movies after that are good), Natalie Portman, Tom Hanks, Tom Cruise (before 2000, there's few movies of his after 2000 that I like), Harrison Ford, Leonardo Dicaprio, Joe Pesci, Jared Leto, Jennifer Connelly, Mel Gibson, Sarah Michelle Gellar.
The list goes on and on, these are just a few actors I like.