==This list needs to be split in two== 

 This list needs to be split in two, possibly sections in the same page: (a) people who are known to have declared a diagnosis of bipolar (Stephen Fry, Zeta-Jones, etc.) and (b) Speculative and/or professional back-diagnoses based on the analysis (not here, not WP:OR) of circumstantial evidence. 

 You can't bring back-diagnosis to the proof standard of "Catherine Zeta-Jones shows her long-form bipolar certificate". You also can't just erase Vincent van Gogh  there are too many culturally significant individuals who have had afflictions of cultural consequence and enough meaning for professionals like dr. Jamison to be able to pattern-match. Each list has a distinct meaning and importance; forcing (a) into (b) and (b) into (a) just erodes the whole process.