They're all based on others indexes to be honest so there isn't really one.
DuckDuckGo is Bing, Startpage is Google, Kagi is seemingly a mishmash of a bunch of search engines (including the Russian owned Yandex) Brave is independent but owned and run by assholes so that isn't much better.
Personally I like Kagi enough and it's independent enough for me to pay for it.
They're all based on others indexes to be honest so there isn't really one.
DuckDuckGo is Bing, Startpage is Google, Kagi is seemingly a mishmash of a bunch of search engines (including the Russian owned Yandex) Brave is independent but owned and run by assholes so that isn't much better.
Personally I like Kagi enough and it's independent enough for me to pay for it.