Loving v. Virginia which found antimiscegenation laws unconstitutional is a pretty major one. in Hague v. Committee for Industrial Organization they ruled against a mayor that was trying to ban literature distribution by unions. Engel v. Vitale found mandatory prayer in public schools unconstitutional. You can skim through this list and it's mostly good stuff (because all the bad rulings usually just uphold the status quo). the supreme court has, on occasion, made good decisions. doesn't mean it's not a fundamentally antidemocratic insitution.