Suggestions on WiFi speaker for main TV

So do you want a wifi speaker or hardwired one w/ hdmi arc?

Or are you saying you want to be able to expand the hardwired one w/ wifi speakers?

It depends on the tv but many times you can set up wireless speakers with them, especially if you have a samsung tv and Samsung sound bar.

But I think I was misunderstanding your original question and you don’t necessarily want wireless speakers, just something to be able to stream music to. The soundbar you mentioned is a great way to do that.

I have zero experience with google home assistant or that product so if that system can do what I’m about to talk about then disregard. Getting a soundbar that works with Alexa would be a great way to get the streaming ability you want and to easily be able to expand with additional speakers later. Whether you went with the sonos or other brands, you can still get those same brand speakers or just add on with Echos to save money and set up different zones.