For simplicity's sake, I recommend using the Anycast hostname as your primary, the location normally nearest to you as secondary, and a different provider for your tertiary DNS. With Anycast, you'll automatically use the server geographically nearest (the one with the lowest latency) and it will be secured with TLS. For more technical information on Anycast, click the link above. The second Anycast IP address is for plaintext DNS (not recommended); everything else is DNS-over-TLS. If you don't know what those are, the next section explains a bit more.
=== Uncensored Anycast ===