More detailed explanations to follow, when I'm not at work. No particular order.
Black Mirror - While only a handful of the episodes this season were among the best it has to offer, it was still a fantastic continuation of one of my all time favourite shows
Better Call Saul - There's nothing else quite like it on TV. A laconically paced study of a character who just can't help but fuck things up for himself and the people he cares about. Properly Shakesperean tragedy for the modern age.
The Expanse - About the closest thing you'll get to hard sci-fi on mainstream US TV.
Narcos - Gripping stuff, even with the dumb voiceover.
Lady Dynamite - It's Maria Bamford, it's structurally groundbreaking, it's challenging, it's great.
Fleabag - Deeply dark comedy (?) about a woman's life falling apart. Utterly brilliant.
Last Week Tonight - The Daily Show, but with more room for segments to breathe and even more righteous indignation. I'll never forgive Oliver for abandoning the Bugle, but this is the next best thing.
Full Frontal - One of the latter day Daily Show's best correspondents gets her own show, knocks it out of the park.
Planet Earth II - The BBC doing what it does best, bringing you beautiful, novel and startling nature footage. The snakes and the iguanas may be the most talked about TV moment of the year, but there are plenty of others that stand out.
Stranger Things - Ultimately this didn't really rise above a nostalgia trip. but boy was it fun.
BoJack Horseman - Rapidly overtaking Archer as the best adult animation on TV
Drunk History - What's not to like? Comedians getting shitfaced and telling stories, while others act them out, burps and mistakes and all.
Another Period - High concept show — what if Downton Abbey was a reality show — with an amazing cast - Rikki Lindhome, Natasha Leggero, Paget Brewster, Brett Gelman, Brian Huskey,Christina Hendricks etc
Silicon Valley - Structurally this is a bit too classical for my tastes, but there's no denying the quality of the writing and the cast.
Not Safe... With Nikki Glaser - Sadly cancelled, this show provided some of the biggest laughs of the year. Feeding lines to porn stars and Tinder tapout are two of the best segment ideas of all time.
Didn't see enough to judge but would probably be in the list:
Catastrophe (season 2)
Comedy Bang Bang!