OLED.
Once you go that route there is nothing else that compares.
QLED is Samsung’s way to try and confuse people and get them to think it’s on par with OLED. It’s close but it’s still just a fancy LED.
OLED blacks are amazing! The Black on the screen is the same as if the set is turned off because those pixels ARE turned off if called for.
Once I got an OLED I can hardly stand to watch my non OLED TVs...
LG C8 has the latest processor so get that if you can. B8 is really close and some say it’s impreceptable difference.
Also LG is the only produced or OLED panels. This if you get a Sony it’s still an LG panel, however it uses Sony’s video processing which is supposedly better than LG. However most say for the money the B8 or C8 are the best vaule as it’s Soooo hard to tell difference between LG and Sony video.