I agree with you about Fuji GF67. I was able to buy mine at a good price at B&H closeout sale some years ago. I wouldn’t buy one at today’s prices. Comparatively easy to carry for a 67 negative, although requires some experience to hold steady.
I originally bought Fuji 645 folder for negative larger than 35mm, while easy to carry around. Disappointed with its quality of construction and rather bulky size. My Super Ikonta A is very small by comparison. Also more robust construction. A post-war Super Ikonta B (6x6) is also a good choice for a folder.
Of course, camera choice is very personal. Also depends upon one’s subject matter. That’s why so many varieties of cameras were produced.
Good luck!