Here is a global roster of environmental leaders that comes to mind:
Jamie Lernier (Brazil) mayor of Curtiba and led efforts to pioneer many ecological practices that led many to call Curtiba the world's first EcoCity
Paolo Lugari (Columbia) Gaviotoas the ecovillage in columbia
Gunter Pauli (JP) fellow Belgian and founder of ZERI and member of Club of Rome
Amory Lovins (CO USA) Rocky Mountain Institute, HyperCar and Natural Capitalism co-author
Paul Hawken (CA USA) National Capitalism co-author and established an Institute with that name in Sausilito CA
John Todd (Boston USA) developed Ocean Arks International to promote his Living Machines
Paolo Soleri (AZ USA) founder of Cosanti and Arcosanti promoting the future city ideal called Arcologies
Hunter Lovins (CA/CO USA) co-author of Natural Capitalism
Janine Beynus (MT USA) poineered the concept of Biomimicry
Richard Register (CA USA) founder of the EcoCities Movement and admirer of Paolo Soleri
Rick Nelson - (Canada) developer of SolaRoof Integrated Farming Greenhouse System
TS Chang - (Chinese) he developed practices for mushroom growing that Gunter helped link to George Chan's Integrated Farming System which was developed in Brazil
Gabriel Cousins (Arizona USA) Raw food healthy living pioneer http://rawfoodsolution.com/tag/gabriel-cousins
Rebecca and Joshua Tickell (USA) - Biodiesel
Van Jones (CA USA)
Georgia and Joseph Malki (NC USA) http://sevenstarevents.com/staff/Georgia-Malki?catid=31