I know that Triple H is now the lead of the creative side of things in the WWE but writers change all the time and they are different for each brand as well.
Head of Creative: Paul "Triple H" Levesque oversees all creative directions and storylines as Chief Content Officer.
Raw Co-Lead Writers: Ryan Ward and Jon Baeckstrom write and manage the red brand's shows.
SmackDown Co-Lead Writers: Brian "Road Dogg" James and John Swikata lead the writing for the blue brand.
Script Editors: Longtime writer Ed Koskey oversees and finalises the scripts for production.
Creative Buffer: Bruce Prichard acts as an upper-level layer between the writing teams and Triple H.