3D Design and model of futuristic, realistic skyscraper

What I need =>

- Design and create a realistic futuristic skyscaper similar as the ones attached as reference images

- Design needs to be original, no copies from other existing buildings nor downloads from 3D sites, although
other buildings can be used as references

- No interiors needed, only exteriors, since it will be used for an exterior shot in a short movie

- All exterior elements separated by groups to facilitate material assignment ( windows, rails, main structure,etc... )

- Final delivery in any of these formats => C4D, .obj or fbx

- Exteriors should be highly detailed as seen in the images

- final model can be delivered in low poly as long as if when placing under a subdivision object, it subdivides correctly ( Catmull-Clark or similar )

- No final materials need to be delivered although for visualization purposes it would be good for the designer to apply materials for the previews