In my opinion, considering both usability and privacy:

1. SearxNG/Searx (Selfhosted) +++++
2. SearxNG (Trusted instances: searx.be, paulgo.io) ++++
3. Brave Search +++
4. DuckDuckGo +++
5. Whoogle (Selfhosted) +++
6. Kagi (credit card and name required) ++
7. MetaGer ++
8. Swisscows +
9. StartPage +
10. Qwant +
11. Ecosia +
12. Presearch +
13. You . com +
14. etools .ch ?

Avoid:

• Google
• Bing/Yahoo
• ¿Phind?

More info:

• https://www.searchenginemap.com/
• https://www.privacyguides.org/en/search-engines/