- Hon. George H. W. Bush
President of the United States (1989 - 1993)
- Hon. Bill Clinton
President of the United States (1993 - 2001)
- Hon. George W. Bush
President of the United States (2001 – 2009)
- Hon. Al Gore
Vice President of the US (1993 - 2001)
- Hon. Robert B. Zoellick
President of the World Bank Group (2007 - 2012)
- Hon. François Hollande
President of France (2012 - 2017)
- Hon. David Cameron
Prime Minister of the UK (2010 - 2016)
- Hon. Gordon Brown
Prime Minister of the UK (2007 - 2010)
- Hon. Tony Blair
Prime Minister of the UK (1997-2007)
- Hon. Gerhard Schröder
Chancellor of Germany (1998 – 2005)
- Hon. Tony Abbott
Prime Minister of Australia (2013 - 2015)
- Hon. Naoto Kan
Prime Minister of Japan (2010 - 2011)
- Hon. Yasuo Fukuda
Prime Minister of Japan (2007 - 2008)
- Hon. Han Seung-soo
Prime Minister of South Korea (2008 - 2009)
- Hon. Máire Mhic Róibín
President of Ireland (1990 - 1997)
- Hon. José Manuel Barroso
Prime Minister of Portugal (2002 - 2004)
- Hon. José María Aznar
Prime Minister of Spain (1996 - 2004)
- Hon. Yves Leterme
Prime Minister of Belgium (2009 - 2011)
- Hon. Hans Göran Persson
Prime Minister of Sweden (1996 - 2006)
- Hon. Mario Monti
Prime Minister of Italy (2011 - 2013)
- Hon. Yukio Hatoyama
Prime Minister of Japan (1993 - 2001)
- Hon. Didier Reynders
Deputy Prime Minister of Belgium (2004)
- Hon. Vicente Fox Quesada
President of Mexico (2000-2006)
- Hon. Fredrik Reinfeldt
Prime Minister of Sweden (2006-2014)
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