I would lean toward an LG OLED set, both for raw image quality and Dolby Vision HDR support. The C3 is coming out sometime soon (probably March), but the C2 is still a great set and available at a discount. You can also buy 42- and 48-inch sets if a common size like 55 inches is too large. Samsung sets can produce great quality, particularly the S95B, but the company's refusal to support Dolby Vision means that some titles won't play in HDR or look as good when HDR is active.
I have a 2017-era C7 and the original Apple TV 4K, and they still work very well over five years later. My only real complaint is that the C7 doesn't automatically switch HDMI inputs when you wake it up using the Apple TV, but that may have changed with newer sets.