Can you tell if you'll get along well with a person by their face ?

Hmm or one you may clash with. Faces say so much. The eyes, the mouth, the expression. Combine that with the sense you get from them, and perhaps yes.

I don't think you can gauge it that way

I can sometimes tell which people I'll have less trouble with and which ones are more likely to be predatory.

Yes I can tell a lot by a face