Brave search because it is their search company that finds new ways to make users more anonymus, Brave is not a middle man for another company.
I don't recommend because they force users to verify when searching if Startpage detects a VPN or Tor.
Some will say SearX, a self hosted search engine, the issue with SearX is the search results can be irrelevent or something random. I support it but I don't use it due to not consistently being relevent to my search or not informative.