You are a very strong candidate. You appear to be a match for all of your schools except Cornell. Cornell is a reach, as you would realize, but as an engineering candidate you appear well qualified for the school. RPI might be a good addition.
Your ACT is fine, but if you feel you performed below your potential, then that would be a reason to retake it.
I’ll add that I realize the engineering programs at the UCs can be very competitive. By suggesting you are a match, this implies a chance of denial.