Some series that I have liked on Netflix:
Love, Death, Robots (science-fiction shorts, animation, each done by a different team)
Stranger Things (fantasy/horror)
Happy (super-dark fantasy comedy -- over-the-top violent and not for everyone)
Wild, Wild Country (documentary series on a cult in Oregon -- fascinating and excellently done)
Ash vs. Evil Dead (if you liked Army of Darkness and the Evil Dead movies)
Maniac (edgy, distopian series)
Wakfu (kid-oriented animated series, but I loved it. Epic fantasy once things get going deeper in series.)
Avatar: the Last Airbender (animated series -- not movie. Same as above.)
The Legend of Kora (animated series. Same as above)