The Holy People in Navajo sacred narratives do not act as _____ when they teach; it is as often by what they do wrong as by what they do right.

Agents imply active participants who influence events or outcomes. The Holy People indeed act as agents in the narratives, imparting knowledge through their actions, whether right or wrong. Thus, this choice does not accurately reflect their role as it pertains to the question.

Arbiters are individuals who settle disputes or make judgments. The Holy People may guide or influence decisions, but they do not primarily function as arbitrators in the narratives. Their role is more focused on teaching through lived experiences rather than making definitive judgments.

Defenders suggest a role of protecting or advocating for a particular position or group. While the Holy People may embody protective qualities, their teachings are more nuanced, focusing on learning from both positive and negative experiences rather than solely defending a viewpoint.

Ethicists are individuals who study or advocate for moral principles. While the Holy People convey ethical teachings, they do so through their actions rather than through theoretical exploration, making this choice less fitting compared to the need for a term that implies moral perfection.

Exemplars are ideal examples or models to be followed. Similar to paragons, the Holy People do not act purely as exemplars since their teachings include both commendable and flawed actions. Thus, this option does not align with the intended meaning in the question.