The Last Kingdom was unknown to me when I encountered it on netflix. And hence was a complete surprise how great it was. Love the more bleak (and real?) atmosphere and the pace is fast. Can't wait for the next season. I never read the books but I read some books of Cornwell a long time ago (if it is the same author), specifically his interpretation of the legend of Arthur, and the show represents his style pretty well.
I thought Vikings was pretty standard and mainstream in comparison. In fact I was first following vikings before I switched over to the last kingdom. Although Vikings was actually not that bad so I might pick it up again.
These days also watching the good place among other things, which I don't think has been mentioned here yet. Enjoying it, there is a nice twist at the end of season 1 (didn't see it coming although the signs are there when I look at it afterwards).