Wow, there is a ton of "hogwash" posted in this thread! I really don't know what kind of image this lady wants of her dad since there no referral to the site of images she liked.
The best way to make any portrait is not by trying something brand new and recommended on the internet. Make the picture of Dad using the same techniques you are already familiar with. Use techniques you understand and have proven themselves to you . Yes most likely you could get results using some of the suggestions listed above, but you may not get anything either. Develop in Rodinal or semi stand developer, Bull S++t! use a developer you are familiar with, if it happens to be Rodinal use it, but understand it is not the only way you can capture or achieve your image.
I have no clue how you plan to illuminate your Dad's picture, but again you don't need to reinvent the wheel to do it. Try first a standard lighting procedure, most likely it will be exactly what you want. Then if you are not happy start fussing around with harder and more directional light. What you describe can easily be achieved with hard or soft, lighting, it depends solely on your placement of the lights you choose. And how you expose and develop the film. A particular film for this type of photograph should be no different than what you normally would used for regular photographs. Ortho most likely would be my last choice, though I have used it for thousands of portraits in the last 50 years. A panchromatic film will do exactly what you want it to for this kind of portrait.
Making a "character" portrait is nearly exact to making a straight photo of someone. I would illuminate a person with a full beard exactly as I would a person without. The shadows from the main light should fall in the exact same areas as with a normal portrait, the high light and catch lights should be placed exactly the same. Watch for a white beard burning out and adjust(feather) the light evenly down towards the chest, allow no hotspots or deep unprintable shadows. No magic or tricks to do these kind of images
just expand a bit from your normal practices! Watch what each movement of a light does, place it where it does the most for your image. The drama comes from how you place the lights not the film and developer.
None of what I have posted here is heresay or in my mind debatable, it is pure fact proven over and over through the years!
Charlie..............................