Cropping or not cropping has been optional in Canada for a long time, so you're unlikely to have quite the same issues with potential bias
Actually, it is one of the few countries whose standard describes both the natural and cropped ear
There have numerous uncropped champions in Canada - so to answer your question, yes, providing the dog is of sufficient quality you have a very realistic chance of winning without cropped ears in Canada.
Actually, it is one of the few countries whose standard describes both the natural and cropped ear