I think you’re selling yourself short. Top schools for CS like MIT and CMU are reaches for everyone. Shoot your shot. Why NOT you instead of Why me. The next step down like a GT or Michigan are no guarantee but more likely.
What area of CS interests you? That should be on your radar. The CS ranking link in my earlier post shows research by disciplines for schools. Chicago is a great school but what if there are stronger schools for your area of interest?
Btw. Some of your “lower” schools like GT will challenge you. You’ll also be surrounded by top students. I think my son said he had 5 or 6 National Merit winners on his freshman dorm floor at GT. CS attracts the top students at all schools. Good luck.