Here is a list of trusted DNS Servers which don’t use filter lists.
Most of them are european.
Switzerland - https://dns.digitale-gesellschaft.ch/dns-query
[Öffentliche DNS-Resolver - Digitale Gesellschaft]
Germany - https://dnsforge.de/dns-query
[ https://dnsforge.de/]
The Service is operated by adminforge.de
Germany - dns3.digitalcourage.de
[Zensurfreier DNS-Server | Digitalcourage]
Germany - https://doh.ffmuc.net/dns-query
[DNS-over-HTTPS- und DNS-over-TLS-Unterstützung [ffmuc.net/wiki/]]
Denmark - https://anycast.uncensoreddns.org/dns-query
[DNS Servers - uncensoreddns blog]
Your DNS Server can still see what websites you want to visit. It’s just that it’s a little bit more complicated for your ISP to see what websites you request through DNS. Because of SNI and other things in the DNS Protocoll your ISP will still see what Websites you request.
But if the traffic is encrypted it can be more complicated to manipulate DNS as a MITM.
I personally wouldn’t use Cloudflare or Adguard. Both are commercial Companies which probably collect data for the US (in Cloudflares case) and the Russian (in Adguards case) government. Cloudflare is too big. There are a lot of independent free dns providers from non profits. The only reason to use something like Quad9 or Cloudflare is if there isn’t a trusted dns provider in your country and all others are too slow.