The class sizes really vary a lot by major. Philosophy is one of the larger Humanities majors, and has a mix of some classes that are around 15-20, and some that get up to 100. English is the same. But a lot of majors have much smaller classes - based on the interests you mentioned, I’d suggest considering Classics or Comparative Literature. The language programs are also really small, and once you get to the upper-division levels, you’re basically studying literature but just in another language.
As someone else mentioned, you do have to make the effort to get to know your professors but they will be more than happy to help you. They love students who are passionate about their subject and want to go into academia. Also, you can take freshman seminars starting your first semester, and they’re capped at 15 students, I think.