Namecheap is ok, but unfortunately they also practice a despicable trend in domain registration, which is to hijack domains with less than five letters and classify them as premium, right on the act of registration. A concrete example: When trying to register aucky.com [for an auction site], a domain resulting from brainstorming and creation, previously non-existent, I was informed that it was a premium domain and therefore subject to other acquisition conditions. I did not accept it and had to content myself with the registration under my country's TLD, which has less punch than a pure .com. My failed domain is up for grabs in the premium market, and the issue will have to be settled in court. This is almost criminal and it has to stop.

Namecheap is garbage.

Slow and dated UI, awful support, and shady practices.

Search for domains on instantdomainsearch.com to avoid registrars jacking up the price when they notice interest in a domain.

Register with Cloudflare when they support the TLD and AWS for the rest.