This is with a Tenda AC10 on a 200/200 line:
Through a wall (but same even if standing next to the router) and probably limited by my phone, it's a 2x2 (2 stream) configuration, router is set to 20/40/80 band, from what I can see my phone is using the 20/40 band. 867Mbps phone peak, since dual band that's 480Mbps max each direction on 80 Hz, router is set to mix, can see phone using 20/40 mix, so ~240Mbps is the phone cap. Getting 160Mbps with 8 other devices connected, 5 2.4Ghz and 3 5GHz, seems good to me (remember, bandwidth is split among all connected devices, doesn't matter if they're using it or not,
that's why WiFi 6 is great, but that will take a while to roll out).
AC10 is R850:
https://scoop.co.za/tenda-dual-band-ac-5dbi-4-port-gigabit-router-no-usb-ac10.html
If your house isn't that large, you can save a buck and go with the AC8:
https://scoop.co.za/tenda-dual-band-ac-6dbi-4-port-gigabit-router-ac8.html
Both of them have beamforming, for shorter range you won't see much difference.
I don't have much experience with any mesh set-ups, but they're generally more expensive, recently some people have been recommending these:
https://scoop.co.za/tenda-nova-lite-dual-band-2-port-ethernet-mesh-system-2pk-nova-mw3.html