Are American TV programs really diversifying?
As soon as TV serials in the United States start featuring more characters of Armenian, Estonian, Bulgarian, French, Danish and Hungarian descent, THAT'S when I'll be convinced that they're "diversifying".
And if you want to see at least one show that's got a protagonist of Armenian descent in it, here's a clip of the intro for Mannix:
As far as I know, there aren't that many TV serials, whether sitcom, adventure or drama, that feature protagonists of Armenian backgrounds today, if at all. Suggestion to TV producers in the US: borrow a page or two from the role Mike Connors played for 8 years, and then you'll be getting somewhere.