The fiddler is Jean Carignan.

But I wouldn't say he died in total obscurity. In the last decade or so of his life he achieved great acclaim and was earning a good enough living that he gave up cab driving.

BTW, in 1972, I was booking a folk concert series at Dawson College in Montreal and booked a triple bill of Jean Carignan, Philippe Bruneau (what Cariginan was to the fiddle, Bruneau was to the button accordion, and Edith Butler). That concert lead to Carignan and Bruneau's recording contracts with Philo Records and helped bring them our of obscurity.

Mike Regenstreif