The most prolific DC writer of all time is Robert Kanigher who is responsible for 3.5% of all DC’s original output across their entire 75-years. Second to him is Gardner Fox. Together they are responsible for more than 5% of DC’s entire output.
The most prolific DC female writer of all time is Gail Simone at No 42. Other women on the list include Dann Thomas (No. 57), Louise Simonson (No. 66), and Devin Grayson (No. 68).
The most prolific DC writer to start working after the Golden Age is Chuck Dixon at No. 3.
The newest writer on the list is Matthew Sturges who appears at No. 61.
The writers with the earliest start dates are Jerry Siegel and Sheldon Mayer who both have credits dating back to 1935.
Kirk cautions that the GCD methodology is nt 100% accurate but this certainly provides a good snapshot.
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Though the most prolific, Kanigher probably has had less actual impact on the DCU as most of his writing was for the war books. Gardner co-created such characters as The Flash, Hawkman and the (OG) Sandman.