They have a whole state to themselves and they're pre-dominantly white. Mormons also produce their own media, they're in the middle of making a multi-part Book of Mormon series. They're an insuluar sect much like Jehovah's Witnesses, so they're not _demanding_ mainstream representation on principle, much like the Amish.

Not to say you're not touching on the question of _why_ we're so enthusiastic in media representation for those of the Islamic faith however, but the Mormons are a pretty open and shut case

Aside from HBO’s ‘Big Love’ I can’t think of any non-comedy fictions shows featuring Mormons.

There have been movies, such as The Other Side of Heaven.

But as a former Mormon myself I think entertainment is more interesting if it focuses on what we have in common despite our differences, rather than focusing solely on amplifying differences.

Mitt Romney shows up in all kinds of tv shows on fox news

Cole on House, Big Love?

Gary on South Park. Of course, that was 18 years ago. There's also a few very minor Mormon characters on The Expanse.

The Expanse had a generation ship for Mormons and a main character has a conversation with a Mormon on a transport ship.