Did you ever see "The Wild Geese" starring Richard Burton, Richard Harris & Hardy Kruger ? One of the characters is as you described. A guy who just happens to be gay and is accepted by all the other soldiers.I think the best contributions to LGBT film and TV were those NON-stereotypical characters that appeared here and there, and who were just taken in stride by the other characters in the story.
GREAT movie and that was the first time I had heard of lesbian singer and musician Joan Armatrading. Found the movie by accident shortly after it was released in the U.S. and it's definitely worth seeing.