As I’ve said before: myself. Using unbound as a recursive resolver and cutting out the middlemen of CloudFlare, Quad9, Google, etc.
Edit: or do you want the authoritative name/root servers my recursive resolver asks? Ok. I didn’t give these as that’s who everybody asks, to include Google, Quad9, etc…hence me harping on saying cutting out those middlemen and asking the root servers directly. www.iana.org/domains/root/servers