We could do with some criteria, but nominating people, and stating why, might be the best way towards forming ideas on what the criteria should be.
John Sweeney with his workshops, listings, and
www.modernjive.com website has some sort of claim.
Phil Roberts, Michaela and Emma have done a considerable job with the Central Franchise, and, usually quietly, pushed the boundaries forward.
Franck, with this forum, might be making now a huge contribution in ways that mostly cannot all be measured.