Ray's Pizza on St Mark's Place consistently rates in the top 3 of many B&T food bloggers rating New York Pizza. It also has some of the worst pizza I've ever eaten in my entire life and a tremendous rat problem.
Those ratings are bunk.
Sacco Pizza on 9th Avenue & 55th St is an underrated gem and a family business since 1972.
I visited New York and ate at a pizza place† that advertised, if I recall correctly, their second-best rating according to someone who had made it their mission to sample and rate every pizza place in New York. (It couldn't have been this guy, since he says he started in 2014.)
The pizza was subpar. Why would I be interested in what someone in New York thinks makes a good pizza? I want pizza that I like, not pizza that some random guy from a different pizza culture likes.
† Not for the rating; I ate there because it was next to my hotel.