CloudFlare since they sell domains at cost and have really good DNS infrastructure with some free protection features. If the TLD isn't supported by them for registration then I'd just use their nameservers.

Or Route53 if you're using AWS since that makes it easier to integrate with the rest of AWS and manage in IaC, and AWS also has robust network/DNS infrastructure.

(I would say GCP if using GCP/Google Workspace, too, but since they split domains off to Squarespace I really don't know what is happening over there anymore as far as domains go.)

So far those 3 have been more than sufficient for all of my domain needs.