In order to get the most out of your high speed internet service, you need a decent router. The TP-Link AX1800 Deco Mesh WiFi 6 System is worth a look. It is designed to cover 4000 square feet. It comes with OFDMA and MU-MIMO to allow simultaneous transmission.
This WiFi router comes with parental controls and network security. It is compatible with Amazon Alexa. The Deco app lets you set this up in a flash. The router supports connections of over 150 devices.