First, Location:
TV in a dim lit bedroom (buy OLED for its blackness and color accuracy, but weaker brightness)

or

Living hall TV (bright area, QLED better for high brightness and viewing angle, full array local dimming is a must)


next to consider is either Android vs Tizen vs WebOS.... (the UI and the apps available)


next based on above requirements pick model suits your needs
(unless you had certain pref brand)

pls consider as normal content(NEWS, SPORTS, TUBES, DRAMA/SERIES) will burn in OLED quicker compared to movies(pixel more active)

so also for normal content, don't bother spend OLED TV price for these content.... QLED(improved version of LED) more than enough
even local dimming not compulsory(living hall)

unless you are looking to max out spending then go either OLED or microLED

* btw, manufacturer will keep on churning out display tech names/acronyms that confused consumer