A world is more than just heroes.
List by Character Type
If you want to choose an NPC by how they interact with the PCs, you can! If you are looking for NPCs more built for combat and battle, choose the Combat option to find soldiers and warriors. The Skilled option will provide you with NPC builds to represent characters based around being skilled, such as merchants and crafters. Running an encounter in a nobles court or perhaps an inn filled with patrons? The Social option will give you all types of courtiers, ne'er-do-wells, and other social types.
Full List by CR
If you want to choose from the full list of NPCs based only upon their CR, choose their CR below.