You should add one throwaway school. Ideally it should be such a reach school that there is little chance of acceptance anyway, and so the weak MCAT / re-applicant status will not affect your application that much. It would be better to do this than being a re-applicant at a school that you have a better chance of acceptance at.
BTW, if you're not African-American or lack substantial service to communities of color, there is no reason why any of the HBCs should be on your list, period. Do your research, people!