Lavender, tea tree, chamomile, rosemary,clove,geranium,ylang ylang, neroli,lemon, orange, thyme,sandalwood,juniper,cinnamon, rose and jasmin. The last two are very expensive.
You also need a base oil, olive, sunflower,jojoba,apricot kernal, sweet almond oil.
You get what you pay for, oil prices vary by market.
To narrow it down, lavender, chamomile, tea tree, orange, rosemary, cinnamon.