It depends on your face shape, hair color, skin color, and many other factors. If you want to make thinning hair look thicker, you can try a layered bob/lob, layered pixie, textured bob, long bob curls, playful texture, etc. As for a classy haircut for balding men, a short combover with temple fade is a good choice. Moreover, you can try messy side part, balding fade haircut, and more.