OK, first of all, it is absolutely ridiculous that you did not include Italian Pizza, which is the original, but not the best.
Secondly, I am a Pizza connoisseur, my life is on the road so I frequently eat NYC, Chicago and other pizza, and it's all good.
The worst Pizza I have ever had in my life is St. Louis pizza. I can't believe they actually advertise that as a local specialty. Sorry. I hate it.
The best Pizza I have ever had in my life is right here in Buffalo NY. There are 15-20 Pizzerias that make more amazing Pizza than you will ever find in Chicago or NYC, and it's very different to both. It's just divine. You have to try it to know what I mean. The best.
So. Best Pizza.
1. Buffalo NY
2. Chicago and NYC thin (tied - I cannot choose between the two)
3. NYC Sicilian Style
4. Italian Pizza
5. English Pizza
6. French Pizza
7. St Louis Pizza
Nowhere else has Pizza famous enough to make the list, not that I know of.
Except Philly. I have never tried Philly Pizza.
Pizza (Italy) and Pizza (US) are basically a different dish.
If you are going to Chicago, there are 10 Pizza places you have to try, but my favourite is Giordano's. It's divine.
If you are going to NYC, there are 20 Pizza places you have to try, but my favourite is Ray's - there are lots of Ray's, some of them not as good, but they're what I recommend. If you want NYC Sicilian I recommend Joe's Pizza on 6th Avenue in Greenwich Village (around about 8th St) in Manhattan. There's a Ray's there too, about 10 stores down, and there are some good Ray's on 8th Ave in Chelsea/Midtown and on 4th or 5th maybe up by Central Park East.