It’s an interesting question, because you kinda have to see a writer in control to see whether they’ve been sunk by the directors/actors, or elevated, and for that they have to either become a director or a showrunner.
How about James Gunn? A bunch of Troma crap -> Scooby Doo -> Slither - Super - Guardians of the Galaxy.
(If you weren’t so dismissive of comics and episodic televeision, I’d suggest John Rogers – credited writer of Catwoman/The Core/Transformers – because of a fucking awesome Blue Beetle run and being showrunner on Leverage. Still, his Catwoman notes and arbitration advice are…insightful on how much writers’ intentions matter.)