Everyone who is expected to contribute anything to the success and growth of the enterprise. The rationale is simple: people authentically support what they help create. No one has commanded passion for the thrivancy of the organization.
Of course, the process must be designed to accommodate everyone, as it easily is with the Agile Canvas model we use. It's very easy, albeit often unusual for organizations, to include literally everyone in a process because everyone has dreams for and questions about its success and growth. And there are always more people than obvious who would want to contribute time and talent to help making new levels of success and growth possible. Strength based and passion inspired organizations know this and leverage this power in how it shapes a more beautiful future.