What do you call a good yeshiva, and what do you consider Chassidish?
Novominsk is quite a balance, if I understand correctly, although primarily Litvish.
Gateshead (England) has a lot of both.
Lakewood Mesivta? (I don’t know much about them, but I know a few Litivshe bochorim from there and a few Chassidishe bochurim from the same place, and I’ve heard the chassidim are well integrated there)