The Best
DynaDot and NameSilo. Both have free whois privacy, free email forwarding and free DNS management. Plus Afternic and Sedo MLS integration for investors.
The Rest
GoDaddy By far the most the most popular registrar. More expensive than other registrars and a little sleazy with the upsells. Some will appreciate the phone support and localisation.
Epik They have some cool features and good prices. I have one name there and may transfer more there in the future.
Google I haven’t tried them but the interface is nice. Prices are a little higher.
PorkBun An oddly satisfying experience.