Head around the shops and have a look. (if Covid restrictions allow)
JB's, Good Guys and Harvey Norman all have great displays of TV's going with 4K demos looping.
Except they all look like crap because they usually have showroom mode turned on. They're generally looping the strawman HDR demos too. Second the recommendation to look at
RTINGs they have a good set of tests and they're good at explaining what the scores mean and why they matter. They also will generally have comparisons notes between competing models and have setup instructions that will give you a pretty good picture without needing to pop a probe on the telly. They only test models they've bought retail too rather than hand-picked manufacturer units.
Sony and LG are my recommendations for medium to high end. I ended up buying a Sony x9000f a couple of years ago. It's been pretty good, only complaint is slight blooming with local backlight dimming (it works in regions rather than being pixel specific like OLED).
JB currently has a number of TVs on sale until the 28th.