Music: United Kingdom
Movies: China. Really, they do great movies. And since Hongkong is again part of China, Hongkong and mainland chinese movie productions have merged and do even greater movies. All the while Hollywood feels formulaic and uninspired. Not like the 80s Hollywood, which was great.
Video Games: Japan. Is there any doubt?
Animation: Tricky one. I could pointing out, the animation work for both american and japanese production is now often done in Korea. But you surely meant the artistic part, not the technical. I think I declare a tie between Japan and the US, both have interesting animation, but very different.
Comics: I probably go with France here. Not sure though, I'm not that deep into comics.
I would add another category you seemingly forgot:
TV Series: Netflix followed by HBO! Wait, these aren't countries? Just kidding. I go with the US on this one. Modern series productions in the US are so much better than what Hollywood currently produces. That is the new Hollywood.