Who was the first openly gay psychologist?

The first openly gay psychologist is often considered to be Dr. Evelyn Hooker. In the 1950s, she conducted pioneering research that challenged the prevailing views of homosexuality as a mental illness. Her work, which included the landmark study "The Adjustment of the Male Overt Homosexual," helped to shift the perception of homosexuality in the psychological community and contributed to the eventual declassification of homosexuality as a disorder by the American Psychiatric Association.