Recently I've been a huge fan of Michael Fassbender, Tom Hardy, and Joesph Gordon-Levitt. All three seem to have come out of nowhere over the past few years. Each giving a stellar performance one after another. Each making a killing in the Action, Drama, and Comedy genres.
My favorite films for them are...
Michael Fassbender
Prometheus
A Dangerous Method
X-Men: First Class
Tom Hardy
Warrior
Inception
Star Trek: Nemesis
Joseph Gordon-Levitt
Inception
(500) Days of Summer
50/50
I'm really looking forward to seeing Tom Hardy as Bane in The Dark Knight Rises and Joesph Gordon-Levitt in Looper. That one reminds me of something out of a Philip K Dick Sci-Fi story. Michael Fassbender was absolutely the best performer in Prometheus. Other good actors in that film were Charlize Theron and Edris Elba.

