Mex was simply spectacular. His athleticism, non-stop engine and all-round rugby acumen redefined the way the position was played - without question one of our great 8's. Wayne "Buck" Shelford was simply awesome.
His presence, physical strength and leadership intimidated every opposition we played against. Buck is the rock solid lock on any Mt Rushmore of AB rugby.
As for Zinzan, his skill-set dwarfed the rest. But. But his playing career IMO is also glorified way beyond what he deserves.
Brooke had it all. He could pass, kick and run the equal of any outside back. Yet his tenure in the position wasn't nearly long enough. In 1994 vs South Africa he was immense. By 1997's draw vs England though he looked very slow and very old.
And now for Kieran, the current AB captain.
Statistically, he's superior to everyone else on the list. Yet what does that really tell us apart from that we've seen from, heard of and studied him so much more than any of the others? In any reasoned debate, Kieran Read is also a great.
In any such argument, he'll always be in the equation.
In terms of whether he's our best ever, again, that can only ever be a matter of opinion.