I’m not getting a “viable candidate for Brown” vibe from the OP, but there are much less competitive open-curriculum colleges as well.
What’s unclear is whether the student is already in college (which is what the post appears to say) or whether the OP really means their child is a prospective college student who is deciding where to apply. If it’s the latter, it would be helpful to have more information about the student (stats, academic interests, budget) in order to make suggestions. If it’s the former, then we need more clarification as to what the OP is asking for. (Transfer options? Places to take online classes that would meet requirements at the current school?)