Use GREP to create a new line and header style after the last occurance of a words only once

Thank you sorry about that, here is what Im' looking to achieve: 

Like what @m1b stated I'm trying to search for roles:

1. Search for certain words in a given story or document, eg, the grep

Role: (Stunt Double|Second Unit Director|Second Unit Director & Stunt Coordinator|Actor|Character)

 2. Pick the last one in the story and add a new paragraph after its paragraph and apply the green sub-heading/rule below paragraph style.

3. The text of the new paragraph style is dependent on the text found in the grep, but not the same, eg "Stunt Double" —> "Doubled For".

Here is the raw data:
I can search and replace the "Production Name:" and the "Doubled For/Character Name:" like previous comments suggested, thank you.

Production Name: The Crown S6, Role: Additional Stunt Coordinator, Doubled For/Character Name:
Production Name: The Larkins S2, Role: Additional Stunt Coordinator, Doubled For/Character Name:
Production Name: Kidnapped, Role: Additional Stunt Coordinator, Doubled For/Character Name:
Production Name: Meg2: The Trench, Role: Stunt Performer, Doubled For/Character Name:
Production Name: Andor S2, Role: Stunt Performer, Doubled For/Character Name:
Production Name: Heads of State, Role: Stunt Performer, Doubled For/Character Name:
Production Name: Wicked, Role: Stunt Performer, Doubled For/Character Name:
Production Name: Blitz, Role: Stunt Performer, Doubled For/Character Name:
Production Name: Red Eye, Role: Stunt Double, Doubled For/Character Name: Lesley Sharp
Production Name: Murder They Hope, Role: Stunt Double, Doubled For/Character Name: Annette Badland
Production Name: Apartment 7A, Role: Stunt Double, Doubled For/Character Name: Tina Gray
Production Name: Dinner with the Parents, Role: Stunt Double, Doubled For/Character Name: Carol Kane
Production Name: Doc Martin, Role: Stunt Double, Doubled For/Character Name: Beth Goddard
Production Name: Challenge, Role: Character, Doubled For/Character Name: Stunt Neighbour
Production Name: A Thousand Blows, Role: Character, Doubled For/Character Name: Head Cook
Production Name: Boat Story, Role: Stunt Double, Doubled For/Character Name: Joanna Scanlan
Production Name: Titanic, Role: Character, Doubled For/Character Name: Drowned Woman Floating
Production Name: Braveheart, Role: Stunt Performer, Doubled For/Character Name:
Production Name: My House in Umbria, Role: Stunt Double, Doubled For/Character Name: Maggie Smith
Production Name: Shaun of the Dead, Role: Character, Doubled For/Character Name: Fainting woman
Production Name: Eastern Promises, Role: Stunt Double, Doubled For/Character Name: Naomi Watts
Production Name: Hyde Park on Hudson, Role: Stunt Double, Doubled For/Character Name: Laura Linney
Production Name: 44 Inch Chest, Role: Stunt Double, Doubled For/Character Name: Joanne Whalley
Production Name: Harry Potter 4 - 8, Role: Stunt Double, Doubled For/Character Name: Helena Bonham Carter
Production Name: Red 2, Role: Stunt Double, Doubled For/Character Name: Helen Mirren
Production Name: White Girl, Role: Stunt Coordinator, Doubled For/Character Name:
Production Name: Skyfall, Role: Stunt Performer, Doubled For/Character Name:
Production Name: Fast & Furious 6, Role: Stunt Double, Doubled For/Character Name: Michelle Rodriguez
Production Name: Mary Poppins Returns, Role: Stunt Double, Doubled For/Character Name: Julie Walters
Production Name: Rocketman, Role: Character, Doubled For/Character Name: Old Pub Woman

Thank you

I'm on a Mac and it is a one time job. Although I will have to do it again once these proofs are checked.

It would search for Stunt Double then create a header and have the name of the show and then the actor name