Depending on what part of the country you are looking in, there are certainly quite a few schools where the vocal program is a strength. Some commonly mentioned programs on here would be Ithaca, NYU Steinhardt, JMU, Belmont, Baldwin Wallace, OCU and Arizona State.
This is not to say you won’t get great training in the other two areas at these schools as well. Again I’m most familiar with OCU and there students in the MT program take 12 credits of dance, which is levelled by ability. And most dance classes are only 1 credit, although there are a few exceptions.
If you are looking for schools that are more likely to stretch you as a vocal student, you may want to check the curriculum of the program. My D was very surprised to find that a number of MT programs don’t require private voice every term. Again, YMMV, but for her this was a deal breaker, and we crossed those schools off the list of places to which she wanted to apply.