WRT Kelsey Grammer, when “Frazier” first aired, the actor who plays Niles Crane (David Hyde Pierce) looked & acted so much like him, I thought they really were brothers. Always thought that the most inspired casting I ever saw TV wise.
David Hyde pierce is an amazing actor. The two of them were brilliant in their “brother” idiosyncrasies. All casting on that show was great.
And Niles, Martin, and Bulldog were all played by gay actors. It would be funny if the guy who played Gil, the restaurant critic, were straight. (Nope.)