I run the KDE desktop a lot less than gnome, but still enjoy the full features of KDE within the gnome shell.
I've discovered that the dolphin file manager is very powerful, and offers some features that I was looking for, specifically browsing image files nested within folders rapidly. One feature that could possibly bother some, is a great one for me! When you hover over images with your mouse, a preview of the image automatically appears as depicted here. If the file is clicked on, it opens gwenview.