Why not take this design and develop it into a working case?
I can see that the video card is not aligned properly, it is too far towards the back of the case. So you would need to add some depth to the case, but otherwise I think this layout can work well. It appears to be able to support a single 120mm radiator, and you could have vents on the bottom or near the bottom for the video card. You may need to add some width to ensure you could get the gpu pcie power connectors in, and perhaps if someone wants to use a gpu block, but this design would be really tough to watercool the gpu as there is very little room for a reservoir and no room for a large radiator.
One thing I would do is probably turn the psu around 180 degrees around the vertical so that the intake fan is in the front of the case, and move the ssd's to behind the psu, and the psu forwards, as it seems like it would be really hard to get to them in the current config. The psu could draw cold air in from vents inside the front cover.