Thinking about Discovery and its unusual format for Trek - where the focus (of at least the first season) was entirely on a protagonist, had me thinking about what it would have been like if this format had been used in the past. Imagine hypothetical Trek series which were done largely from the POV of a single character on any of the series - likely a main cast member, but perhaps some recurring guest character. Which characters had the depth to pull this of, if not for a full seven seasons, then at least for a multi-season run?