[Semaphor]

For me, #1 is the official documentation, #2 is a decent looking tutorial, #3 has a slightly better page on google, #4 is a clear kagi winner.

Neither of them offers bad results, but we are talking about google, it makes no sense to give example searches without saying what results you receive as Google is so heavily personalized.

Kagi does personalization, but it’s explicit. You yourself decide the region to search in (my default is international, though there are quick bangs to search in other regions), and you can up- or downrank domains, as well as block them completely.