Final answer:
The character from 'Canterbury Tales' that predicted harvest is The Franklin. This character is known for his hospitality and love of fine living.
Step-by-step explanation:
The character from Chaucer's Canterbury Tales who is the overseer of the crusaders and is known for predicting harvests is D. The Franklin. The Franklin is described as a gentry landowner, fond of fine food and drink, and he also takes pride in his hospitality. Although not directly involved with the crusades, the term 'overseer of the crusaders' can be misleading. In historical context, an overseer would be something akin to the Reeve, who managed estates. However, in this context, the Franklin is likely meant as he fits the description most closely.