David Hyde-Pierce, John Mahoney, and the guy who played Bulldog all were gay.
One of the creepiest shows was when Martin took Niles and Frasier ice fishing. In the fishing shack were “beefcake” posters on the walls. Hubby and I had seen the re-runs for years and loved them. Last month we both noticed for the first time the posters on the walls.
There were at least 3, perhaps more (the 3rd being the gourmet radio talk show host character, Gil Chesterton, played by Edward Hibbert). Mahoney, I was never quite able to definitively confirm, it seemed like his private life was sealed. Some claim he was, others not. Curiously, I thought Peri Gilpin was a lesbian.