Matt: Looking at more images is, of course, good advice. You've mentioned in the past several names I wasn't aware of, so, thanks.
I got stuck on the Minor White/Ansel Adams axis in high school (68-72 or so) when every issue of Aperture was jaw-dropping amazing. I really wanted to study with Minor White (who was at MIT when I was), but realized a hyperactive computer nerd might grate on White's sensibilities...
An attempt from those days...
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Do you have the negative at hand? What is it's actual size in mm?
FWIW, the '85 Hasselblad 500CM here is 53x53mm, the '53 Rolleiflex T is 54x54 mm, and the no longer here Mamiya 7II was a seriously glorious 54x70 mm.
Although I've never used a GX680, I was photographed by one once (they were standard for wedding/family studio group photos here in Japan in the good old days).