Han Solo
I really have to say I've warmed up to this guy as Han Solo. Sure, he looks very little like young Harrison Ford. But he's got a few similar qualities, and he also is a very good lead actor that will be able to carry the movie, with the help of a few others.
So of all the other known actors we saw on the short list, he is without question the best choice. And with Rogue One being such an excellent spin off movie, I am very optimistic.
Can't wait to see the first photos of him together with Chewie and the Falcon, and see if it feels right.