General:
* Luminary: Suggests a bright, shining light that illuminates the way.
* Sage: Implies wisdom and deep understanding, often acquired through age and experience.
* Mentor: A guide and teacher who helps someone grow.
* Illuminator: Someone who sheds light on a subject, making it clear.
* Oracle: A source of wisdom and prophecy, often seen as divine or prophetic.
* Prophet: Similar to an Oracle, but often with a message of social or political change.
More poetic:
* Stargazer: Implies someone who seeks knowledge and understanding from the heavens.
* Visionary: Someone with a clear view of the future and the ability to inspire.
* Muse: A source of inspiration, often associated with art and creativity.
* Philosopher: A seeker of wisdom and truth through reason and logic.
* Bard: A poet or storyteller who uses words to enlighten and entertain.
More specific:
* Teacher: A traditional term for someone who imparts knowledge.
* Scholar: Someone with deep knowledge and expertise in a particular field.
* Guru: A spiritual teacher, often associated with Eastern philosophies.
The best word will depend on the specific context and the tone you wish to convey.