Here are some of the top essential oils I like to keep handy due to their basic breakdown for cleaning purposes. These have many more beneficial properties than just these, but since I tend to use essential oils more for natural cleaning agents than for internal or skin use these are the qualities in which I am interested most.
antibiotic, antifungal, antiviral, antibacterialeucalyptus
tea tree (melaleuca)
mint (peppermint, spearmint, wintergreen)