@dinosauce Strength and relevancy of courses that fit into each college requirement is very important.
If you plan to study BME, it is best to line up all APs related to it. AP CS won’t do you any good to BME. AP Biology, AP Calculus BC, AP Chem, AP Physics1/2/C, strong candidates also take microbiology, pathophysiology, robotics in local colleges or high school CTE.
Some gives you better chance with ACT, or SAT with science subject tests.
Same to your EC, relevancy is very important. Robotics club chairman, UIL Science, biomed internship and related positions will help. Your science research with professor is an excellent example. A first chair in orchestra won’t help much.
Many t20 ED are binding so normally students won’t blast to t20 because of that. And with your high caliber ED gives you an edge.