Angel Orders:

Principalities : Seventh ranking order. The Principalities are the guardians of all large groups on the earth, including nations, religions, great cities. In the New Testament Principalities refers to one type of spiritual (metaphysical) being which are now quite hostile to God and human beings. (Rom 8:38; 1 Cor 15:24; Eph 1:21; 3:10; 6:12; Col 1:16; 2:10, 15) Given their hostility to God and humans due to sin, Christ's ultimate rule over them expresses the reign of the Lord over all in the cosmos. Among their leaders are Nisroch, Amael, Haniel, Cervihel, Requel.

Archangels : Though a lower ranking order, its members could be of other hierarchies, like the Seraphim Metatron and Michael, the Cherubim Raphael and Gabriel. The term "Archangel" is generally taken to mean "chief or leading angel". Archangels are the messenger of God and the most important link between him and mankind. The archangels command the heavenly army in the war against Satan. Islamic belief knows four archangels, Christian and Jewish at least seven, though the names aside from Gabriel, Raphael, Uriel and Michael are open to debate. Again, here one finds high ranking angels like Metatron, Michael, Gabriel in charge.

Angels : "Common" Angels are the last order of angels and are only one stage higher than man. They work more closely with humans than the other orders, Guardian angels are among them. Ruling princes of the Order of Angels include Phaleg, Adnachiel, Gabriel, and Chayyliel.

And there are many more. One order I think should be named are the Watchers, or Grigori.