OLED displays look the best when they're brand new. The problem is that they fade with time, and are more prone to image retention/burn-in issues.
For my money, I'd rather buy a QLED with mini-LED backlight. You lose a bit in the blacks vs OLED, but they're brighter overall, and tend to be more durable. If you go that route, mind the number of backlight zones, that's a big differentiator in this type. LG's QNED TVs are more or less the same tech as QLED + mini-LED, just sold under a different name. TCL's 6-series TVs are a solid bang for your buck.
The Holy Grail is MicroLED (not to be confused with mini-LED, which is a COMPLETELY different thing), which is like OLED but gets rid of the organic bits that hurt their durability. Currently, though, they're only available on 'I want a video wall, and I don't mind spending six figures for it' setups.
A few years ago Consumer Reports put out a survey report that said Vizio and Hisense TVs have the highest failure rate.