Thanks @elviiso. I am using the Justified Gallery and have tried Masonry. Justified works fairly well for very small galleries (in how it will allow the last row to be a larger size).
However, for large galleries, there doesn’t appear any way to break up the monotony of the super aligned grid, if all/most of the images have the same size/aspect ratio. It would be great if there were an option to add some variation to the size of the cells/thumbnails in the grids, to give it more of a mosaic style (which is often more interesting to look at).
