Very confusing question.
First, everyone in the world except those five swilling beer in the corner are NPCs. Yeah, the elf, deva, tiefling, aasimar and drow. Them.
If you mean in the party, I almost never do this. The party might meet them or go back to them, but they are not party members.
If you are trying to separate monsters from NPCS, that is a false divide by the rule of most RPGs, who have 'human' as a monster type. Yeah, I do see the point of a human and a dragon with one clearly the monster, at least by physical looks.
If you mean NPCs as role-play fodder, which is what I think you mean, then I stat up very few of them as it is not long before the normals in the game are totally overshadowed in pwoer by the party. Sure powerful NPCs are are aound and they might be statted up, but in my case, generally not.