Angels of the World
Angels of the World:
Principalities
The Principalities are angelic beings shaped like rays of light. They lie beyond the group of archangels. They are the guardian angels of nations and countries, and are concerned with the issues and events surrounding these, including politics, military matters, commerce and trade. One of their duties is to choose who among humanity will rule.
Archangels
The Archangels communicate between God and mortals. These angels tend the larger arenas of human endeavor and act as the administrative leaders of the Heavenly beings. An archangel is usually given a task of great importance to men. The word archangel is used only twice in the canonical Scripture—but several times in the Septuagint, once to refer to Michael the archangel and the other to who is believed to be Gabriel during the return of the Lord (Gabriel is preferred over Michael since he is the messenger angel).
Angels of this order include Raguel, Zadkiel, Metatron, Gabriel, Michael, Jophiel, Chamuel, Uriel, Saraiel, Remiel and many more.
Angels
These angels are closest to the material world and human begins. They are the ones most concerned with human affairs. Within the category of angels, there are many different kinds, with different functions. They deliver the prayers to God and God's answers and other messages to humans. The angels are also sent as messengers to men.
Angels of this order include Ariel, Zadkiel, Samael, Gabriel, Michael, Ophiel and many more.
In addition all human beings have a light being accompanying them through life.
Guardian Angel:
A Guardian Angel is bound to a person from birth to death. Guardian Angels' duties are to provide protection, guidance, and companionship. Each human has their own guardian angel assigned just to them.
Earth Angel:
Last but not least we should remember that we all have the potential to be an earth angel and that ascended masters were humans, who had done so much good for this world and had reached enlightenment, so that their light being was absorbed by the higher light vibrations in order for these masters to continue their work as helpers, guides and teachers from higher vibrational spheres.
Ascended Masters
Ascended Masters, as the name connotes, were common human beings who had reached enlightenment and who due to their good deeds for humanity ascended to higher vibrational sphere, were they can continue their work of helping, guiding and teaching others on their way to spiritual development and enlightenment. The resurgence in the prominence of Ascended Masters as guides, teachers and helpers on the spiritual path goes back to H.P. Blavatsky the founder of the Theosophical Society and Alice Bailey, who channelled and wrote the teachings of Djwahl Kuhl as well as other ascended masters. Ascended Masters are pre-supposedly the ones vibrating nearest to the to our planetary spheres and they are great guides and teachers on our way to enlightenment. Ascended Masters were once earth angels who then ascended to higher planes, due to their good deeds.
Ascended Masters include Mother Maria, Jesus Senada, Budda Gautama, Buddha Maitreya, St. Germain, Sanat Kumara and many more.
This list is based on the writings of the Wikipedia dictionary.