Bit late of a reply, I just found this thread randomly, anyway...
Politics - Winston Churchil (anyone who said Obama, slap yourself)
Film - Brad Pitt
Sports - David Becham
Art - Da Vinci
Literature - Shakespeare
Science - Charles Darwin
Religion - Jesus because he is the only real guy.
Music - John Lennon
Celebrity/light entertainment/TV - Simon Cowell
Fashion - Armani
Business - Bill Gates
Voluntary work - Ermmmmmmmmmmmmmm...