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.
Domain registration and all other services should be separate. You don't want DNS, web hosting, mail hosting, etc. ToS applied to your registrar account because it increases the risk of the account getting locked.
I haven't had that experience at all with them before. I also don't put much stock in one off experiences from someone who is admittedly not in a situation that almost anyone else, much less someone registering their domains through GoDaddy currently, would find themselves in (i.e. operating an online casino and engaging in behavior that is very obviously a legal/ToS gray area at best).
They specialize in domains management for businesses who consider their domain to be _very_ important. Think Google, Amazon, Microsoft, Wikipedia... (all of those are listed as clients on the wiki page)
As in "pay a lot of money", and we'll dedicate someone to your domain who makes sure that "giving a domain to a stranger without any documents" will _never_ happen.
a number of the largest companies that used to be 'clients' of markmonitor have now basically become their own domain registrars and have a direct relationship with ICANN. Amazon for instance. It's curious that google was one and has offloaded it to squarespace.
I'm pretty sure google never used them for their own domains, and the whole markmonitor/squarespace thing was their "google domains" product where they sold registrar services to others. Besides that they also are a registry for .app/.dev and others, but don't sell them via their own registrar anymore.
See other sibling comments to yours, but you basically have named support contacts who would have been the human-in-the-loop ensuring that a situation like OP's can't happen.
I haven't spoken to them in like a decade, but they also offered other monitoring stuff like notifying you of likely phishing registrations, etc. And it's no longer novel now with options like Route53, but they used to be one of the only solutions with proper RBAC/delegation/audit logs.
Namecheap has had its own host of issues like a few years back breaking hsts and causing tons of sites to break for quite a while and their response was basically oh well. That incident along made me move my domains off to porkbun.
Realistically you should never use the registrars dns to begin with. But you can set your own dns with porkbun, I have customs dns on all of my domains. I especially have been doing that since the Namecheap hsts issue. Can't trust any of them.
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.