Di Caprio for his parts in Jango and TWoWS. Absolutely top class performances and entirely different from the likes of Inception and the Revenant.
Robin Williams. From funny guy to acting out heartfelt scenes. Guy was a genius.
Denzel Washington. Can play a bad guy that scares the shit out of you to amazing performances in The Book of Eli.
Joaquin Pheonix. Always amazed at how much I hated him as Emperor in the Gladiator (Crowe had a great performance also) to absolutely mastering Jonny Cash. And his Joker performance was nothing short of perfection.
David Tennant if were looking outside Hollywood.