Best picture quality so far
The C7 is the best-performing TV we've ever tested, beating the 2016 B6 below by a hair, in particular with high dynamic range content. Another 2017 TV we yet haven't tested might beat it, but for now it's the king.
Tied for best picture, but more expensiv...
Unless you have even more money to burn than the typical OLED TV shopper, you should choose the less expensive version of this TV: the cheaper C7 above. They have the same image quality.
Second-best picture quality
LG's 2016 4K OLED TV delivers absolute black levels and infinite contrast, along with superb uniformity and off-angle viewing, and none of the blooming associated with local dimming LEDs. It's not quite as good as the C7, however.
Best LED LCD picture quality
It's close between this TV and the Samsung below, but the Vizio's better black levels and control of blooming, as well as its flat screen, help tip the scales in its favor. It's not as bright, but that won't matter for most viewers.
Best non-Vizio LCD picture quality
If you're looking for something that's more expensive than a Vizio but not quite as pricey as an OLED, the excellent picture and slim styling of this Sony could be just the ticket.