Like with any big purchase, the best TV brand comes down to what you need the TV for.
There are dozens of brands out there but we generally only recommend Samsung, LG, Sony, Vizio, Panasonic, TCL, Philips, and Hisense. Each have different product ranges encompassing different prices and features.
If you're on a budget then a cheaper TV brand like Hisense or TCL is a good bet thanks to both brands offering good features at very good prices. However, if you're looking for a high-end OLED then something from LG, Sony or Panasonic is a better option. The latter of which tends to offer better built-in audio than any other OLED TV maker out there.
Alternatively, if QLED looks appealing to you then you can't go wrong with Samsung. Samsung is generally a pretty good all-rounder option too.
There's also the matter of whether you're already familiar with a particular TV brand. If you're familiar with a certain interface or smart TV platform then it makes sense to stick with what you know (unless you hate using it, of course!).