Yes, I know what you mean about the Hierophant being the rational, "rule-following" side. So many people have a bad reaction to that, and honestly I think it's an outmoded slant for the card. Pharisees, indeed! What did he call them, "sons of vipers" or some such?
Some Tarot creators have replaced the Hierophant with a female image (i.e. Ancestral Path). But I'm thinking of the HP as the "Keeper of Mysteries" and the Hiero as "Revealer of Mysteries." With the HP, God's Word manifests internally (thus, Annunciation); with the Hiero, God's Word manifests externally (thus Moses or Jesus). Moses gave us the Word, but Jesus told us what it meant. And that's what a Hierophant should do, IMHO.
One Love All Love,
Moonchild