BetterTouchTool (which isn't free but is worth every penny) lets you do everything rectangle does. Also lets you configure your mouse buttons to do whatever you want. Also infinite custom hot keys and shortcuts.
Also Raycast as a replacement for Spotlight.
I hope everyone reading this knows that you can just not connect a "Smart" TV to the internet. Leave it as a "dumb" TV.
Get a separate device like a Roku or AppleTV or Amazon Fire or whatever. The garbage hardware that TV manufacturers slap inside a TV so they can advertise its "smart" features will always be inferior to a purpose built external device.
To say nothing of the security implications of having an unpatched probably unsupported IoT device running on your network for years.