The Writers Guild of America, West has ranked The 101 Best Written TV Series. Topping the list at #1 is The Sopranos.
Genre shows regarded as the best-written series of all time are:
3. The Twilight Zone
26. The X-Files
33. Star Trek
38. Battlestar Galactica
40. Game of Thrones
49. Buffy The Vampire Slayer
79. Star Trek: The Next Generation
90. The Prisoner
The WGAW is sending certificates to the writers for these series — Harlan Ellison announced he’s received two, for Alfred Hitchcock Presents and Star Trek.