Arrow J-Pole or make a di-pole
I have an Arrow J-pole attached to an old broom handle bungied to my fence. I take it down during lightning storms (not grounded to earth). I like that antenna because I can take it down easily and even bring it with me in case I want a good antenna for my HT.
It's a dual band, but I'm just running my FT-2900 on it in my garage. You might want to make a di-pole to stick in the attic or in a tree outside - barely noticeable.