I really liked all of the MIT philosophy courses[1] I've taken. Introduction to Philosophy of Language in particular was really interesting. I also took Yale's "The Science of Wellbeing"[2] after reading about it on HN. It's great, but not exactly a traditional class where you learn some piece of information and then move on. It's more like going to the gym where you're meant to continuously put what you've learned into practice. Now that I think about it perhaps I should take it again!

[1] https://ocw.mit.edu/courses/find-by-number/

[2] https://www.coursera.org/learn/the-science-of-well-being