Mosca is my first person I wish to look at, not because he was really anything special in the ring, not be cause he is one of those people that had a great life outside the ring, not because he fits in as a Canadian in an interesting way, being that he is not Canadian, but because alphabetically, he is the first that I could think of.
He did have a long life outside the ring, for all you gridiron fans out there, you might know that Mosca had won five Grey Cups in the Canadian Football League. But as many wrestlers were, he came from the football world into the wrestling world, and had a pretty decent career.
Although he may never have won a world title, he did compete in wrsetling promotions around the world. He would work with the AWA, NWA, CW, WWC, and most importantly for his Canadian connection, Stampede Wrestling.
One of the biggest wins of his career would be when he won the World Television Championship in a tournament in Raleigh, North Carolina. He would beat "Mr Wrestling" Tim Woods on April 14, 1976, before losing it to Paul Jones. He would stay around Championship wrestling wrestling in many tag team matches, probably as his knees began to give out.
Never a mainstay in any promotion, he would garner some respect as a wrestler and promoter in his adoptive city of Toronto. "King King" as the massive 310 pound man was called, would always be a draw to the southern Ontario fanbase, and bolstered one of Canada's hotbeds, Hamilton to some great showings. He would bring in Ric Flair and Dusty Rhodes for great feuds between them and himself.
Later in his career, he would leave the ring and work elsewhere. As a manager, he would wrestler his namesaked son in the World Wrestling Federation in the 1980s, and even before that would work as an announcer, showing off his big lungs that he would use to put over wrestlers, especially his powerhorse son.
Never a great wrestler, at such a great size and after great knees, he always had a heart for wrestling, and remains a Canadian celebrity of sorts.