exemplar

noun exemplar

• ideal — a standard of perfection or excellence.
• model — a standard or example for imitation or comparison.
• paradigm — Grammar. a set of forms all of which contain a particular element, especially the set of all inflected forms based on a single stem or theme. a display in fixed arrangement of such a set, as boy, boy's, boys, boys'.
• example — A thing characteristic of its kind or illustrating a general rule.
• archetype — An archetype is something that is considered to be a perfect or typical example of a particular kind of person or thing, because it has all their most important characteristics.