...Do you have any negatives where the scene is illuminated by less contrasty light, but still exhibits a wide range of tones? A scene where the illumination is high overcast, and the shadows are present, but illuminated would be a great target. The classic "light from a north facing window" can also be great.
Below is a shot taken on the same roll. There was a high overcast with diffuse light. For info, the photo of the negative was taken with it on a small light-table (as was the earlier shot).