Indie labels have been covered. On the corporate side, you have of course The Tragically Hip, who are still going strong after all these years, Barenaked Ladies, Sloan, Treble Charger, Sum 41, Kardinal Offishal, Choclair, Nickelback and Alanis Morrisette, to name a few.
You might want to check out the
CMIR Artist's directory to give you a rough idea as to what's out there. It looks out of date and is by no means a complete list, but the CRIA doesn't seem to have one availabl and this will at least give you a starting point.