Cohen’s music isn’t always for me, but I love this rendition of “Hallelujah” in Yiddish - I prefer it to the English version:
My taste is somewhat eclectic so the only thing of him I knew ( and liked ) was 'Everybody knows' ( https://www.youtube.com/watch?v=Gxd23UVID7k ).
Incidentally, why is WP writing about him now?