OLED has the best dynamic range and blacks, to my eyes. However, when I bought my 82" TV, I opted for the Samsung QLED models in lieu of OLED because I had very bad screen burn with my old 55" OLED TV.
Either from video games or the news tickers on channels like ESPN or Fox News can slowly burn in over time. Granted, my 55" OLED was bought very early on, so some of the technology may have changed to make this happen less often.
Honestly, my QLED looks absolutely amazing and I don't miss the OLED much, which I keep in my room. Can I tell a difference? Definitely, but that could also be because I'm usually watching 1080p or 4K content on the 82" screen vs watching that same content on a 55" 4K TV.
I will say, I find it hilarious how some people ask questions like this and then go buy a cheap brand. There is more to a screen than a simple resolution count.
ETA: Also, the cost of the same size OLED was something like $4-5,000, so saving $1-2,000 on going with a larger QLED was just the better decision for me and my budget, at the time.. I bought my Samnsung from a buddy of mine who i've referred a lot of AV business to, over the years. He hooked me up with that amazing TV and a Sonos Arc sound bar with the Sub, all at his costs.
