Calendula • peppermint (contained) • lemon balm • chamomile • thyme • sage • garlic (lots) • yarrow • plantain (it'll volunteer) • aloe pot indoors • elder shrub + willow at the boundary if you have space • pumpkin in the veg patch. All are hardy, most self-seed, and every one is dual-use (food/tea/medicine).
Grow-your-pharmacy bed
One raised bed of calendula, chamomile, thyme, sage and yarrow covers most of this module.