There are two national scholarship programs that you may want to investigate:
QuestBridge: This is an opportunity for top students from lower income families to get a full ride to a top college. They can list up to 20 colleges in the order of their preference and if the college also selected the applicant, they’re matched at their top choice. The Match Scholarship | QuestBridge
Posse Scholars: This is a program that you have to be nominated for, but it’s designed for students who show a lot of leadership potential and come from underrepresented backgrounds. Posse Scholars are given full tuition scholarship. Shaping the Future | The Posse Foundation