I've got a body that looks terrible in anything close fitting, and me in a biking jersey is an oxymoron.
My new, favorite fabric is merino wool. It is available in various weights (thicknesses) and is soft, not itchy like regular wool. It has good wicking properties, and remains warmish when wet. I would not buy merino wool shorts or tights because it does not stand up well to friction so the seats will wear out.