Ancient Egyptian is kinda misleading. Yeah, there's Ra and Anubis and the whole guys with animal heads piloting boats on lakes of fire thing, but there's also their hyperscientific sun cults and the path and the way which are totally free of mysticism and miracles. Egyptian mythology is not some continuous monolithic faith, it's just the stuff we've pieced together from some broken rocks. From what we know of some of the pharaoh's, I think some of the more reasonable egyptian cults might be the correct answer.