[Captain Peter Blood]

Look up his obit, his partner is mentioned there.

[Fai Mao]

Like this one from the Saw Yuck Times? Not mentioned at all. I am not saying you are wrong but I do not find the mention and he never to my knowing claimed to be a homosexual.

https://www.nytimes.com/2018/02/06/obituaries/john-mahoney-actor-best-known-for-frasier-is-dead-at-77.html

[Flaming Conservative]

I’ve looked up 2, plus Wikipedia; no mention of any homosexuality or gay partner.

[Albion Wilde]

While I am not disputing that Mahoney may have been gay, he does not seem to have been out, definitely did not want to be out, and was not claimed in numerous obits to have had a partner. His New York Times obit does not mention any gayness, but does allude his claim that because of a colostomy, he avoided sex:

John Mahoney, Actor Best Known for ‘Frasier,’ Dies at 77

Here is the obit from the Hollywood publication, Variety, which also does not claim he was gay:

‘Frasier’ Star John Mahoney Dies at 77

So, what is your source, Peter Blood?