Hmm. Favorite actors. This question is always so extremely hard to answer, because there's just that many good actors out there. And some get the recognition, some don't.
First off, Tom Hardy. Absolutely a beast of an actor. His Mad Max performance was outstanding. It made the movie what it was supposed to be. The Drop. Damn, diverse as well. Such a different role from what he usually plays, yet it was so good. The Revenant. Well, I know Leo FINALLY got his oscar. But, I actually hoped Tom Hardy would get it in this case. Because holy hell that acting of him.. He just MADE people hate him, it was his role and he made sure to do it good. Oh, and we can't forget about.. He's a big boy. For you.
Joseph-Gordon Levitt. Hm, still one of my favorite actors. Started of as a kiddo in Third Rock from the Sun, now played in several big movies like Inception, The Darkn Knight Rises, Looper.. and more. He even directed and played his own movie, how much of a boss do you have to be to do that, right?
Matthew McConaughey. Dem abs... But seriously. I mean, I don't have much to say, but his Interstellar role have me so much love for him. Sure, he plays in a lot of awful movies, but he's definitely worth a mention because of the career he built. And, because of that Interstellar performance, I just have to put him in my list.
Honorable mentions: Leonardo DiCaprio, Johnny Depp, Christian Bale, Brad Pitt, Edwart Norton, Ray Liotta, Anne Hathaway, Jodie Foster
@OP: Enrico colantoni, I can definitely agree. He plays a somewhat big role in a show I'm currently watching (Person of Interest) and I absolutely love how he plays it. Also, Flashpoint is very good indeed.