Nextdns and the RPi alternative do it. Kagi has all the infrastructure in place to make it happen at the search level, it just requires more manual work right now.
There is no one list to rule them all. Tons of people curate their own block lists and make them available. It’s entirely up to you to pick and choose which ones you want to use that most align with your views on SEO garbage. You can override them with your own preferences too, as I do all the time with NextDNS. Like I said, all the infrastructure to support this is already in place in Kagi, they just need to implement the support for external lists.
For example, here is a list of the crowdsourced blocklists available in uBlock Origin: https://github.com/gorhill/ublock/wiki/Filter-list-licenses