Actually, in my experience working with individuals in deep trance, the most common spirit channeled is a spirit guide. Angels are also often channeled but spirit guides are generally the focal point of a persons contact with the divine. (Although I have spoken via channel with both Angels and Arcangels. When I say spirit guides I am referring to a spirit of one who has previously had many lifetimes in a body and has the experience to guide and council one who is currently in a body. They also, or at least the lead spirit guide of an idividual, will call inn other spirit guides and /or angels as necessary to assist the person based on their requests. But they must ask.
Now in all my experience, with hundreds of spirits, have I every had something come thru representing itself as God, so to speak. to me that would be like trying to locate the internet on the internet. You can locate millions of various sites, search engines, etc. but the internet is the combination of all of it. You cannot tune in to one location called "the internet." I see God (which I refer to as Source Energy) in much the same way.
With the many spirit guides I have spoken with that have been channelled by the person in trance, they consistantly say that they act as the coordinator or the laison between the embodied person or spirit, and the divine.
Hope this helps.