Good question! Over the last couple of years I have watched some exceptionally brilliant Tv shows. One of my absolute favorites is Twin Peaks. The intertwining story, the slightly comical characters, and memorable soundtracks. It is not a recent tv show, being released back in the early 90's. But will truly rival many of the modern blockbusters.
For true (American) comedy genius, look no further than Community and Arrested development, but even for the British viewer these two make is to the very top of my list. They are also two of the most experimental tv shows that I have seen, as far as script writing and plot development. no one could predict what was going to happen!
To name a few more greats: Peep show, Fresh Meat, The Office, Breaking Bad, Game of Thrones.