I like all the Earth GL's, but even I admit there are a lot, and right now it looks like Guy and Simon are going to be the GL's left in the lurch at the moment comic-wise.
I wonder if more people think of John as a founder then they think of Hawkgirl.
Hal has been pretty consistently a part of most DC media since Rebirth.
He's been in several cartoons, Lego games, Injustice, animated movies, etc. People can claim the Green Lantern that most people know about is John, and I won't dispute how important his being in Justice League was for pop culture and his character, but I can't see how anyone could follow DC media in the past decade or so and not have some awareness of who Hal Jordan is, even setting aside the failed movie.