As it hasn't been mentioned yet, I use namesilo.com.

What originally drew me to their service was 2FA, no additional services bullshit (i.e. I'm never going to buy "web hosting" from a domain registrar, I don't want the current-customer-spam they all use to cross-sell) and decent prices.

They've recently started selling "web hosting" but so far it hasn't really been pushed, and their focus seems to be very much on domains still.