Gladius Legis
Legend
Game of Thrones will be forgotten in 5 years. I guarantee it. It's already missing from many of the all-decade lists being published. And good riddance to bad rubbish.
It's only connected by the vague concept. It's had three seasons now. Basically a small-time mob drama set in Hollywood.I saw the movie, but I don't think I've heard anything about this one?
Two shows that I'm surprised have not been mentioned yet:
True Detective - Season 1 was simply astounding. Some of the best TV of all time. The second season wasn't great, but it wasn't unwatchable either. And season 3 was really quite good, even if it wasn't up to season 1 standards.
Rick and Morty - The fanbase may be toxic, but the show is legitimately hilarious and incredibly well thought out. Great writing, great animation, great voice acting. It may still be going but I'm guessing it's only got another season or two left.
Beyond that, I'll throw my hat in with Hannibal and The Good Place. Brooklyn Nine Nine for best standard sitcom. Supernatural and American Horror story have my nod for being awesome at their peak, and not-awesome at other times.