I never really liked him, mostly on account of him playing unlikeable characters. But I did come to admire him a lot. And I don’t think I’m wrong if I say he actually improved with age. Not every actor ages gracefully and retains the versatility of his younger years. But Plummer certainly did.
Yes, Plummer was Canadian. He actually grew up here, in Montreal. Apparently he loathed the film that made him famous (The Sound of Music), always referring to it as S&M or The Sound of Mucus

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I read that his death was caused by a fall. He had no known illness. RIP Mr. Plummer.