During my research of how to generate better game pitches & concepts, I finished some courses focused on branding and storytelling principles.
Rhetoric of Story: Learn the 7 foundations of storytelling (Udemy)
Pretty good overview of the fundamental principles of storytelling, from the author who spent a lot of time researching the subject.

Advanced Science Fiction & Fantasy (Udemy)
Storytelling course with in-depth focus on science fiction and fantasy as new mythology.

Business Branding: The Complete Course Part 1 – Strategy (Udemy)
Fundamental course about brand strategy.

Business Branding: The Complete Course Part 2 – Expression (Udemy)
Fundamental course about brand expression.

Business Branding With Personality: Build An Authentic Brand (Udemy)
Branding course with focus on brand personality and archetypes.

Brand Naming Bootcamp – Learn How To Create Memorable Names (Udemy)
Course about various brand naming techniques.

Short master class about connection between brands and storytelling.
