Quiz - who is this?

This longtime Raelian quit worshipping alien sex cult spacecraft a few years ago after 20 years of being a top ranking member of the movement. His unorthodox ideas didn't stop a town in the Eastern Townships from honoring him by naming the local arena after this wacky William.

Fun-fact Hintclue: he once proposed to channel the Lachine Rapids for electricity, a proposal that was taken very seriously at the time.

UPDATE - quiz cancelled due to crushing lack of interest. The Answer, though you don't deserve it - is that it's PQ backbencher Roland Dussault who says he became a Raelian only after being voted out of office in 1985. He now has a blog denouncing the tiny perfect alien worshippers. Dussault has some sorta sports complex named in his honour in Sherbrooke.