I have an LG C1 I bought 2 years ago - it's overall an amazing panel, and use the 120Hz refresh rate for high FPS games on console. I'd recommend a C2 (newer version).
For higher-end panels, it's basically either LG (OLED) or Samsung (QLED). They each have their own strengths (like true black for OLEDs, or brighter whites for QLEDs), but they're all good. For all the lovers of Sony TVs out there, they're LG panels, at least the past few years.
In terms of price, you typically find either 55" or 65" the best deals, because each TV panel is cut from a giant mother glass. It happens that 55" and 65" cuts perfectly evenly into smaller pieces from this giant panel, which is why they're among the most common.