Don't think I've seen enough that I really liked to give a Top 10 (i.e. watched multiple times), although Eyes Without a Face, Diabolique and Martyrs would all be in there. Possession is another although possible, although it really
needs a rewatch. I also liked Climax (2018) quite a bit.

Think Calvaire is a Belgian movie...

You're right, Noé's films are all decent. I see others have put Irreversible on their list although I don't personally regard it as a horror movie so wouldn't include it.

Yeah Ils is a decent movie. Set in Romania I seem to remember and the ending was quite chilling.