As others have said, this is the OLED section, so people are a bit biased here. Coming from a Vizio LED backlit, really the only concern for you is whether the OLED will be bright enough for you. Even if it can get bright enough to compensate for ambient light in your room, if you're used to having a really bright screen, even in a bright room, you might not be able to achieve that with an OLED. If you plan to watch a lot of HDR content, there is discussion about the brightness being better for those features, but you would also be dealing with the bloom of LCD due to the backlight zones. Where the OLED really beats the LCDs is in the deepness of black (the individual pixels just turn off) and as a result, the contrast, plus the viewing angle.
Preference aside, through many reviews and shootouts/overall best TV comparisons, the 2017 LG OLEDs are being ranked the highest with the Samsung QLED ranking near the top, but below all of the various LG OLEDs. That should be enough to let you know the LG is the way to go, so long as you have the money to spend. This isn't to say the LG OLEDs are without fault, and you can find plenty of complaints on these very forums, but they still provide the best picture quality available right now.