I'll suggest Searx/SearXNG as a search engine. It's self-hosted, but you can find public instances at https://searx.space/

If you decide to go the self-hosted route, it's trivial to deploy with searx(ng)-docker. Being a meta-search engine, it can pull results from Google, Bing, DuckDuckGo, dictionaries, torrent sites, etc; this gives it a degree of customisability that traditional search engines don't have.

I'll also mention Whoogle, which serves as a libre front-end to Google, although it doesn't currently support any other search engines.