Generally, I agree the FAFSA contributor should also be the CSS Profile custodial parent. We need to hear from OP which parent provided more financial support in the past 12 months. That should be a straightforward calculation.
If OP is certain they won’t qualify for need-based aid at the schools on the list, there is NO NEED to complete FAFSA or CSS Profile. Unless the school requires those for merit aid consideration and OP is interested in merit aid. The list of schools that requires FAFSA for merit aid consideration is small.
ETA: OP should clarify with their HS counselor what they were talking about when they said FAFSA is required for colleges to review an application. If OP lives in a state that requires FAFSA for HS graduation, they can either choose to complete it or complete the waiver instead. All the FAFSA required states have easy one page waivers that waive the FAFSA filing requirement.