Narcos on Netflix is very good.
Bosch on Amazon Prime is pretty decent.
The first season of a show called Tyrant was good, I haven't seen the second, so I can't judge it.
Sons of Anarchy is still pretty good.
Ray Donovan on Showtime is very good. Banshee is good, if you are willing to view it more as a live action comic book.
HBO's Deadwood, The Wire, True Detective (season one), Boardwalk Empire, Oz, The Corner, and The Sopranos are all good if you haven't seen them. I'd watch them in that order. Treme was excellent, but might be too American.