Yeah, agreed, Marginalia’s more suited to discover small-web type of content.
Another thing that’d be better as a daily driver, but requires manual curation, is to filter out specific domains in your searches. Brave supports that with the Goggles feature, Mojeek calls it Focus. AFAIK Kagi too has a similar feature.
I don’t know any search engine that’s able to fully exculde paywalled content though.
Maybe not exactly what you’re looking for, but Marginalia (https://search.marginalia.nu/) focuses on non-commercial and text-based content.
They’re talking too much business to be a ‘private’ search. They don’t make any effort to explain how their search is private at all (except the 90/10 share model).