I would have to say...Neil Young. I hope to fucking god, nobody here says Justin Bieber.
The title of this thread is best male musician (Canada), so why would anyone mention Justin Bieber?
Ray...I'm hope your joking. Key word is hope.
I wound have to say Randy Bachman, not only that he made two good bands The Guess Who and BTO (Bachman-Turner Overdrive)
If you said female from Canada, I'd Alanis Morissette, but male is tougher. If Neil Young is from Canada, I'd go with him, but Our Lady Peace is pretty good too.