The guild, which represents writers in the motion picture, broadcast, cable and new media industries, released its ranking of the 101 best-written TV shows based on a poll of its members, with comedies and dramatic series evenly represented in the top 10.
The guild favored recently-produced shows. Only one top 10 entry, third-placed "The Twilight Zone," pre-dated the 1970s and nearly half the entire list aired in the past decade.
In releasing the list on Sunday with "The Sopranos" at the top, the guild's Paul Brownfield said: "No show has been more responsible for TV's storytelling renaissance." In the HBO hit, mobster Tony Soprano, played by James Gandolfini, struggles with domestic life even as he orders mob hits and confides in his psychiatrist.
Comedies joining "Seinfeld" high in the poll included 1970s-era hits as "All in the Family," "The Mary Tyler Moore Show" and "M*A*S*H," along with bar-room comedy "Cheers."
Long-running animated show "The Simpsons" was ranked 11th, followed by the 1950s hit "I Love Lucy." "The Daily Show With Jon Stewart" at 17 placed highest among series outside the scripted comedy or drama format.
While most of the series on the list were hits in their day or at least enjoyed a steady run, the short-lived "Twin Peaks" (35), "Friday Night Lights" (22) and the cult series "Arrested Development" (16) also fared well.