LG you can use alexa for voice recognition and you can do search with you tube, opening different apps, and turning the tv off without using the remote. In addition, you can link google assist to the tv as well, which is more power full than the alexa but in order to engage with google you need to hold the mic button.
https://www.amazon.com/LG-OLED55GXPUA-Alexa-Built-Ultra/dp/B0817K3L6W

