The poll includes registrars which are set to serve bulk registrants in one way or another. However, sometimes it may be useful to use retail registrars. Endusers who are reading this (as the forum is indexed by search engines). And even we the domainers on various occasions may need to use retail registrars. The 1st case - own not-for-sale domains, as it would be more safe. An account with a bulk registrar should have an email address attached, as well as whois, so due to security reasons whois/account email domain should be better regged elsewhere.
So, as per own experience. The retails registrars I personally tried and can recommend.
1) EasyDNS.com - retail registrar based in Canada. Professional DNS service is also available. They respect the law and do not block domains arbitrary like some other registrars. No order from Canadian court - no blocking. Owners blog:
https://easydns.com/blog/ . Worth reading even for non-customers. The owner (or CEO?), Mark E. Jeftovic, is well-known and respected industry figure.
2) Gandi.com - an old registrar based in France. Strict EU privacy rules apply. Simply works. Hosting and related stuff is available, but in some aspects it is intended to be used by technically advanced users imo.
3) DomainIT.com and PairNIC aka Pairdomains.com - U.S.-based registrars, good support, all working as it should. No issues reported by endusers.
4) Hover.com - retail "arm" of Tucows. Based in Canada obviously. Extra services like professional email. No issues with billing or support.