If you just want something "unlike JS" it should be pretty easy to figure out which languages are in demand and pick the one (or two) that most appeal to you.

If you just want something "unlike JS" it should be pretty easy to figure out which languages are in demand and pick the one (or two) that most appeal to you. If you're particularly into obscure languages, I suggest getting involved with the language community (meetups, open-source projects, etc) because for the less-popular languages the community and the employers have a lot of overlap.