Personally I think that natural brows looks best with thick-framed glasses. Since these frames are a little bit thick, thick arched brows is not suggested. Moreover, the natural brows shape will service both the symmetry of my face as well as the hefty frames. Hope this helpful.
Personally I think definitely the natural brows or the lightly penciled ones. While I love a fresh-looking bold brow, I think it competes a little too much with the frames.