You want to know where all the ancient Greek gods are described? How about the Heroes? They are all here in this two volume set. Appolodorus compiled the Greek myths here. Undoubtedly used by all subsequent (post 140 AD) compilers of ancient myth, this is the source. Although Hesiod and Pindar (and possibly Ovid) were his sources, you would have to read each of them to find but a quarter of the material on mythology.