Everybody always gives credit to the actors, and people who are really into movies give a lot of credit to the director, but should we give more of the credit for a good series to the writers?
With a few rare exceptions like Charlie Kaufman, a handful of scifi icons, and writers who are also directors, nobody ever knows who actually wrote the script. But isn't the writer the single greatest influence on the quality of the TV show or film? Not even great actors can make a crappy script work, and a great script can make mediocre actors look brilliant.
Influence and creative credit are two different things. The producers and the studio executives are the most influential, always have been and seemingly always will be. Nowadays, studios and producers delegate a lot of influence to favorite directors, though.
Creative credit is something else, and the primary credit should go to the writer. If a producer or a director has assembled a "script" from rags and patches by multiple writers, the result is pretty much guaranteed to be mediocre. Also, producers and directors sometime act as writers. They deserve credit in that case, although for some reason people seem to overlook their role in writing. Sometimes it seems as though screenwriters sometimes get into directing in a desperate attempt to keep the director from screwing up the script.
Incidentally, if there is no script, the main credit goes to the director.