Recently I made a collection of 13 building models that have some procedural controls such as window light control and rooftop material controls.
The buildings are completely textured.
Here is the wireframe:
The buildings vary in poly count but should be relatively lightweight.
I made a free sample pack containing 4 of the buildings.
You can download that on my gumroad: https://mart0nnn.gumroad.com/l/citybuildingassetpack
And the full pack is available for purchase on Blendermarket for 6 USD:
Cheers!