3. Stephen Fry
The 'QI' host and the other half of 'Fry and Laurie' is the highest ranking British wit master who still lives on today. The presenter, author, writer and actor (who famously portrayed the Oscar Wilde to brilliant effect) has built up a notorious reputation through his genius of observation.
The man who proclaimed that "animal testing is cruel. They get nervous and get all the answers wrong." is also quite the philosopher. He rightly predicted that "the e-mail of the species is more deadly than the mail".