I don't know if "underrated" is the right word but Matthew McConaughey has really come out in the last couple years and been incredibly impressive. It seems like yesterday where his entire existence was tabloid shirtless photos. He is absolutely, insanely good in True Detective:
If you haven't watch that show yet, get on it. I also really, really enjoyed Mud. And obviously, his performance in Dallas Buyers Club was unbelievable. He apparently only has one accent though ( I just noticed that pulling these clips :-P )
It's also a shame Emma Stone is mostly known for being beautiful and sexy because she is a fantastic actress with a pretty wide range of characters.
Tom Hardy is probably one of my favorite actors of late. Check out Bronson and then try to remember which guy he was in Inception.
+1 because I love the song in that opening scene: The Walker Brothers - Electrician