I feel like most people on reddit (and probably here, too) only really watch American shows, but there IS a lot of good content in Europe and other countries as well. Sometimes those shows come to the US in a butchered, Americanized remake, but those are rarely as good as the original show.
Bonus points if it's not orginally in English (so British & Australian shows don't count either!).
One of my favorite tv shows (at least the first season) is the French 2012 supernatural drama series Les Revenants. It's got a captivating story with some great acting and a killer soundtrack (by the Scottish post-rock band Mogwai, if you're into that kind of music). It fell apart a bit in season 2 and never got picked up for a third season, but it's still very much worth watching for that first, brilliant season.