Frenchman Octave Lapize, winner of 1910 Tour de France.
He is noted for looking at some Tour officials on the climb of the Col du Tourmalet in the 1910 Tour de France and yelling, “Vous êtes des assassins! Oui, des assassins!’ ( ‘You are murderers! Yes, murderers!’)”
(also I am guessing known for his awesome 'stache !)