SCTV. Launched legends John Candy, Eugene Levy, Martin Short, and others. It really rivaled or beat SNL for hilarity and originality.
Wasn't Kids In the Hall Canadian?
As for the others in this thread, never heard or seen them except Schitt's Creek which I tried to watch and totally un-funny. I could not even get thru season 1. Really dumb. Surprising too, I like Levy and that female lead, who are in many Christopher Guest films which are excellent.