I second CWRU as a “safer” admit (is any strong program a safety?). The school is strong in engineering, CS, chem and physics. More importantly, they encourage and facilitate double majors and minors, and you are not locked into a major until late sophomore year.
Case practices yield management and the AO may think you are using them as a safety, so if you apply show a lot of interest. If they think there is a good chance you will matriculate, they would likely throw a healthy merit award your way.