General:
* Eloquent: Fluent and persuasive in speaking.
* Articulate: Able to express oneself clearly and effectively.
* Compelling: Having the power to hold the attention of an audience.
* Engaging: Interesting and captivating.
* Effective: Achieving the desired results in communication.
* Powerful: Having a strong impact on the audience.
Specific qualities:
* Charismatic: Having a magnetic personality that draws people in.
* Passionate: Speaking with enthusiasm and conviction.
* Humorous: Using humor to connect with the audience.
* Knowledgeable: Having a deep understanding of their subject matter.
* Prepared: Well-rehearsed and organized.
* Confident: Speaking with assurance and self-belief.
* Authentic: Being genuine and sincere.
* Inspiring: Motivating and uplifting the audience.
* Persuasive: Convincing the audience to agree with their point of view.
* Informative: Providing clear and accurate information.
More specific words:
* Orator: A public speaker, especially one who is skilled in rhetoric.
* Rhetorician: A master of rhetoric, the art of effective communication.
* Sophist: An ancient Greek rhetorician, often known for their clever arguments.
* Bard: A poet, traditionally one reciting epics and associated with music.
The best word to use will depend on the specific context and the speaker's strengths.