Is it one that you just use and works just fine? Or one that has proven to be reliable and responsible if they do a mistake and only want to satisfy you as a customer?
Not Gandi. They were very reliable since the beginning of the internet but they sold the company and went downhill since.
I really want to say Gandi but they charge too much now and removed the free mailboxes.
Anyway, I’ll vouch for Netim. Their prices are similar to (old) Gandi and they have a mailbox too. I’m looking into Spaceship for some other domains because they’re really cheap.
I use porkbun because i can and do pay with crypto to renew my domain.
Pork bun
I’m using PorkBun and I’m happy with them