A useful Web site for sufferers of affective disorders is www.pendulum.org.
Many sites list celebrities who have suffered, including www.geocities.com/coverbridge2k/artsci/famous_people_depression.html.
Much of the information on Winston Churchill, Harrison Ford, and others was gleaned from Wikipedia and linked sites.
The National Institute of Mental Health site is www.nimh.nih.gov/health/publications/depression/complete-publication.shtml, and the WHO’s is www.who.int/mental_health/management/depression/definition/en.
For a brief discussion of whether depression is epidemic, see D. Summerfield (2006) Journal of the Royal Society of Medicine 99: 161-162 “Depression: epidemic or pseudo-epidemic?” ...