In addition to the East Coast LAC’s (Vassar/Skidmore/Wesleyan/etc) that have been mentioned, Lawrence University in Wisconsin might be worth a look. It’s more known for its music conservatory than for theater, but it has great performing arts facilities because of the conservatory, and its theater program might fall in that sweet spot of being strong enough to be attractive, but not so elite as to be inaccessible to non-majors. Lawrence generally makes it very easy for students on the LAC side (which is great academically) to participate in performing arts as non-majors or to double-major or minor. https://www.lawrence.edu/academics/study/theatre_arts They give nice merit aid too.
University of Richmond could be another to consider. https://theatredance.richmond.edu/major-minor/theatre.html
and maybe Vanderbilt? https://as.vanderbilt.edu/theatre/curriculum/minor.php