Cool project. For sure, consideration of the use of the knife will determine size, shape and length of handle and balance. I’d also suggest of course this is something you would want to make a physical mock up for, assuming the knife makers can help with their knowledge.
Styling wise, I like B. A feels too much like a Global, and C doesn’t do much for me.
Have you seen the Marc Newson knife? Kinda modernist style I know you go for, with the contrast being the traditional blade and also unique tang design. Maybe something to consider playing with the small details rather than overall styling.
R