These human figures are around 100 MB each. Only interesting if you need very highly accurate models.

H

Hello

100MB is an archive in which:
1. Textures .png (8192x8192px) ~ 70 MB
2. Geometry .obj (~ 50000 polygons) ~ 5-7 MB

If you need to use many models in the scene, you can reduce resolutions of the textures

Also you can use people lowpoly 3d people for long camera distance