I’d just get a plain stainless panel, they also come in a quilted type pattern....and I’m assuming you will have other things on the countertop. It has to be functional rather than just decorative, at least, to me. I just don’t think tile would look right and I wouldn’t tile the whole space. The stainless will match the hood nicely. All you can do is try it and see. If you don’t like it; return it. (Meaning, don’t install it but just prop it up and see what you think). That is what I would do.