Check out EERO.

Just installed pro version (different options for installer if you are a dealer) Best buy and amazon don't have the pro options. Had a customer that we tried ethernet over powerline adaptors, Access points in repeater mode. Nothing worked. Installed EERO in 5 minutes and customer is loving it. This is a legit solution when you need it. 2 story 4000 square ft home works Flawless. It is basically like Sonos but for WiFi. It used a mesh network to communicate.

https://eero.com/