For those wanting a hitch rack and still open the rear hatch, this is what you seek:
Only potential issue I have with this setup is carrying a heavy load on my hitch rack, it can bounce me around a little as it cantilevers the rear end, or something along those lines.
Just know that extending the trailer receiver can lower the tongue weight capacity. Leverage. I don't know the formula but it can affect it.
Having said that, and apart from the cargo/liftgate clearance, sometimes it's helpful to have the trailer hitch a bit farther away from the liftgate for opening clearance, especially when there's a hitch jack that's a little too tall.