you have to be joking
My criteria would be someone who gets the most out of their cattle but not at the expense of the horse's long term career. Or if they do go hard early they still are going as older horses too. Purdon has big money, but is also a GUN judge at the sales, and he gets them up as 2yo's but also they seem to keep going as older horses. Tonkin's are great judges too but for me they seem to have a lot of major injuries with their younger ones and not many race on to be great older horses. Just my observation.
you have to be joking
NSW: David Thorn & Team McCarthy (Luke & John both excellent)
QLD: Grant Dixon
VIC: Kerryn Manning
SA: no standouts
WA: Gary Hall SNR
They are the standouts in my view. D Thorn is my pick of the above but I am biased of course.
Nicole Molander, small stable but impressive strike rate & with a top driver in Blake Fitzpatrick.