If you can find them, almost any short-range unit would do.
Your problem will be how to adjust it after it's on the roof. Hardly worth the effort to put a rotator on it.
They do make some amplified "directionless" antennas. Low profile and all that. You might see if you can find one of them.
I have room in my attic, which would probably be the best place if I can find a good unit that is fairly small. My problem is that I live in a stucco clad house--If I can just get the antenna above the stucco, I should get great reception.
Do they make a small unit with a remote rotator on it?