I assume that a roof antenna is out for cosmetic reasons.
I had such a situation recently, and the solution was a MAGNUM DYNALAB ST-2 antenna. This is a vertical whip about 5 feet long, 1/8" in diameter, and almost invisible, so I could put it on the roof. Being a vertical whip it is truly omnidirectional, which the common turnstile antenna is not.
It is nowhere near as good as the large multielement FM antenna on a rotator which I use for my main system, but it surely beats anything indoors.
I had such a situation recently, and the solution was a MAGNUM DYNALAB ST-2 antenna. This is a vertical whip about 5 feet long, 1/8" in diameter, and almost invisible, so I could put it on the roof. Being a vertical whip it is truly omnidirectional, which the common turnstile antenna is not.
It is nowhere near as good as the large multielement FM antenna on a rotator which I use for my main system, but it surely beats anything indoors.