Tricky Gallery Block problem (Slideshows)

Hello Everyone,

I've been trying to figure out this for a few days, but with no success. It is actually a tricky thing to explain 🙂

I have an issue with Gallery Blocks, more specifically Slideshows. I'm a photographer and I have images that I need to put in the same slideshows (Projects) that have different aspect ratios (6x6, 6x7, etc.)
When I do this the gallery automatically the image with the widest aspect ratio and uses that size as the standard for that slideshow, like this: 

Why is it not good for me:

Because I have several slideshows scrolling down my homepage, and let's say that there is:

- 1° Slideshow that has as first image a 6x6 and second a "WIDE" one.

- 2° Slideshow that has only 6x6 images.

What happens is that the only 6x6 is going to be a bigger image/square that the one in the mixed slideshow, because that 6x6 hight it's given by the height of the WIDE image. and that looks very bad.

The perfect solution for me would be for every image to reference to the size of the square, like this:

Know, before anyone tells me to use the Crop option, I can say for sure that I don't want my images to be cropped!

Hopefully I explained myself because Is not easy to phrase this problem!!

Thank you in advance to everyone!