Don’t rule out a flat wall mount! When last I looked at them about 2 years ago, they ALL made it easy to simply lift the TV off the mount (for access to all the ports). And flat screen TVs get lighter all the time.
The only problem I’ve had with my flat wall mounts is that they ALSO come with a screw to secure the TV against being shaken off the mount - and that screw can be hard to access! It’s needed in Earthquake country (where I live), but can likely be left uninstalled if you aren’t in Earthquake country.
Another option is the tilt/turn mount. Most can be arranged so the TV is still flat against the wall - just out a bit farther than a pure flat mount. Advantage is that the TV can be TURNED significantly gaining access to all the ports - without having to disconnect anything or remove any hard to reach screws.