Logan.
I often think Hugh Jackman is a little flat, and lacks range. He is significantly broader in this movie and played a believable old man. Old Man Logan being a specific type of old man, and Wolverine being the defining character of Hugh Jackman's career (IMHO).
Patrick Stewart, well epic as always.
I'm loathe to give a rating at all to be honest, I was very impressed with it and very sad at the same time, there were tears and there was laughter. If I was put on the spot it'd be a high 8/10, the thing that let it down was the antagonist characters were pretty much irrelevant, the movie could have progressed just as well if I'd never seen Richard E Grant.