Alongside The Cosmic Doctrine, W.B. Yeats's A Vision ranks particularly high in my estimation. Most of the others -- The Urantia Book, A Course in Miracles, Meade Layne's collections of the messages of E Yada da Shi'ite, the Seth material, Edgar Cayce's material, etc., etc. -- don't really interest me.

James Merill's The Changing Light at Sandover is seriously worthwhile as literature -- arguably the best piece of channeled literature so far, in fact -- but I don't use it as a source for occult teachings.