1. NetworkPaddy Chayefsky
Coen Brothers
Paul Schrader
Chayefsky and Schrader were basically the best screenwriters ever. And the Coens are just masters at everything.
John Milius.
The movies that he basically wrote, or wrote minor pieces for (and there are several where he isn't officially credited) is unbelievable.
He basically wrote Apocalypse Now.