Could you tell me a bit more about the method you used to minimize the over-sharpening? The Star Wars UHD could certainly benefit from that too.
Another possibility might be the edge sharpening filter of the old freeware TMPGEnc. The slider setting allows negative values (-1 to -127) – presumably for anti-edge sharpening, both horizontally and vertically. (The later versions only have positive edge sharpening).