65" / 77" Full Motion TV Mount 90 degree

I need 2 90 degree TV mounts. One for the bedroom which will get constant use extending. One for the living room which won't as much but might get swung to be viewed from the dining room.

I have this 65" LG C6 in the bedroom and expect a 77" LG G6 in the living room.

Right now we have two mount it mounts that were left. It works okay with the C6 but is not easy to extend out and feels just a little sus. https://www.mount-it.com/products/long-extension-tv-wall-mount-80-inch-tv-mi-372

I'm thinking we need one with two arms for piece of mind and easier movement. I also will want a sonos mount for a sonos arc ultra in the future that is tied to the TV (faces the same direction)

Anyone have first hand experience + suggestions? I was thinking maybe this mount it one but not sure if the sanus ones at costco are just as good.