Harlan Ellison and John T. Dugan (as John Kingsbridge) come to mind for their famous anecdotes about it. Both of their episodes turned out fantastic from our POV, but they were NOT happy as writers. And I think a big name like Rod Serling would be unwilling to put himself through it for one TV sale.
Ben Brady, the producer of 'The Outer Limits' second season had this to say about Harlan Ellison and his story 'Soldier' in 'The Outer Limits Official Companion' - "Ellison got as close as a TV writer can get to having complete control over his material," said Brady. "He was truculent, and extremely difficult; he
vanished all the time. It took him weeks and weeks to deliver a script, but once we got it, it would be pretty goddamned exciting. If we wanted to change it, he'd be dying to do, and what are you going to do with such a talented writer - let someone else screw around with the dialogue?"
Seeleg Lester, 'The Outer Limits' script editor during the second season had this to say about Harlan and 'Soldier'. "Harlan could pitch the idea, but he couldn't get the script in on time," said Lester. "He thought the concept of 'Soldier' was novel and earth-shattering, and the whole thing is just about this guy who becomes an automation and follows orders. The production company was entitled to one rewrite. If we wanted any more, we'd have to pay Harlan some more, and when I turned in the second draft, Ben would have shot me if I'd called Harlan back. It
still needed work!" Lester would end up doing a top to bottom rewrite of 'Soldier' while Harlan started work on 'Demon with a Glass Hand', his second story contribution to 'The Outer Limits', which would encounter the same difficulties when Harlan was late in turning in his rewrites.