Split grade I never used, maybe this is the way?
It's certainly what I would try. But in this case, starting with grade 5, not grade 0. Grade 5 controls the shadows, has very little impact on the highlights. The low values—the man's face—is where your problem is, so that's what you want to determine first. Make tests strips only of him in grade 5 until you find your sweet spot, in which you have the details you want (or that you can possibly have, depending on what's on the negative) and the tone you want.
Don't go too far, as dry-down could have a major impact here, depending on your paper.
After that, you can do your test strips at grade 0 (or 00) for the rest, which is mostly in the higher register. There will come a point in which grade 0 will have some impact on your shadows, so you have to watch that. I'd look for a point in which the paler parts of his garment are closer to white than to grey, but they key will always be his face. Too much grade 0 and it will turn into mud.
If you focus only on your subject, grade 5 first, then grade 0, you should get there. My feeling is that after that you probably will have a bit of burning to do with the background, since the amount of grade 0 you put in will probably be short. One way to avoid too much of that is to crop.