I need desperate help. I must find 4 Canadians who influenced Canadian history throughout the 1900's (1900-1999). So far I got Gretzky, but that's about it. I can't find anyone else. I can't use Trudeau because I already wrote about the October Crisis (which he was a big part of), and that woman activist who fought for women's right to vote is already out of the question. Any help will be appreciated.

And as a side note, I need to find information on the Creed Telegraph System. All I know is that it was invented in 1900, but that's it.