These are only people I have personally shook hands with and spoken to:
Stephan Harper, Prime Minister of Canada
Mirek Topolánek, Prime Minister of the Czech Republic
Michaëlle Jean, Governer General of Canada
Daniel Libeskind, Architect of the Freedom Tower and the Royal Ontario Museum Extension
Gordon Pinsent, Canadian Actor (Hap Shaughnessy from the Red Green Show)
The Canadian Tenors, music group
Gregory Brill, President of Infusion Development (and I met their VP too)
John Tory, PC Party Ontario Leader
I'm sure there are more, bank executives, other corporate leaders and others I can't think of at the moment.