Agree with a lot of already recommended series - Vikings, Parks and Recs, Breaking Bad, The Wire (highly recommend)
Some of my recommendations:
Sons of Anarchy
Shameless
Riverdale (Netflix, only 2 seasons but really good)
Snowfall (again, only 2 seasons so far but damn good)
The Office
Eastbound and Down (Hilarious)
Law and Order SVU is pretty good, it tries to pull stuff from current events to use in the plots.
Jericho was a really good show too, it's post-apocalyptic fiction.