Extending home network based on Netgear NightHawk X4S AC2600 Smart WiFi Model: R7800

Hello community,

I'm interesting to extend my home network.

The network includes a lot of devices, including TV's, mobiles, computers and other devices.

TV's should be covered by WIFI by chromecast (or another same technogy. your advice is welcome here too :-) ) 

Please advise about possible hardwire for above perpose from below list: 

1. Nighthawk® AX8 WiFi Mesh Extender, 6Gbps

2. Orbi Tri-Band WiFi 6 Mesh System, 6Gbps, Router + 1 Satellite

3. Nighthawk® 12-Stream Dual-Band WiFi 6 Router (up to 6Gbps) with NETGEAR Armor™, MU-MIMO, USB 3.0 ports

Thanks in advance.

Eddie