chauncey said:
What would be the superior Canon camera for non-insect macro shooting?
IMHO and without any budget restrictions:
Macro shooting = resolution
If under controlled light conditions and with tripod I'd go for the camera with the highest resolution
==> 5DS(r), with "r" depending on what you like better
If the camera should be more versatile, if light could be sometimes not so good, if handhold would work against highest possible resolution I'd go for an universalist
==> 5D4 (or 5D3 if price is too high)
If budget is something to consider, I'd go for the best APS-C sensor:
==> 80D