Glabella/radix/bump reduction: are my desired results attainable? (Photos)

Click on the "Learn more" link, just below my response, or go here:
FacialSurgery.com/RealSelf/RealSelf_spoilers11.html
I made a computer morph of your nose, and an animation of the morph, to show the changes that are possible for your nose in truly expert hands.You are absolutely correct, that if your bump is taken down, the radix must be deepened as much as possible, or your profile will end up resembling a Roman statue's profile, with the forehead sliding right down onto the bridge:FacialSurgery.com/RealSelf/RomanStatue.jpgThe tip of your nose is also strongly forward projecting from your face, so in the morph, I brought the tip back. In the animation, you'll see that de-projecting a nose like that tends to allow the upper lip to relax a bit. The woman in the short video that I posted with this answer had a strongly-projecting nose.Then, I elevated the tip: your models' noses are very short. Very nice, I think, so that would be a goal for your nose as well. Some of those models' noses, though, are really very very small in their radix projection and the height of the upper part of the bridge. It probably wouldn't be possible to get that small on your nose, given where your anatomy is starting, but the goal would be to get as close as possible.
You should understand that the changes I demonstrated in the morph require advanced techniques, techniques that most plastic surgeons cannot handle.  Be sure to read the section in the "Learn more" link on how to stay out of trouble while searching for a rhinoplasty surgeon. Rhinoplasty is an exquisitely difficult operation to get right, and you should only have surgery if you are able to make yourself very confident in your surgeon's skills. 
I'd love to hear what you think of the morph. Did it seem to address your main concerns? I could modify the morph to your taste if you wish.
Your nose is also a good example of why computer imaging is mandatory in rhinoplasty. You need to know exactly what the surgeon is planning to accomplish -- what features he thinks he can change, and by how much he thinks he can change them. When you see his goals, you'll know whether he has an eye for an attractive nose, and whether he shares your opinion of what constitutes an attractive nose. You'll also know whether the changes he proposes are enough to be meaningful to you, and whether he understands your wishes enough to address all of your priorities. How would you ever get that figured out without the morphs?! But remember, you're not hiring him for his skills with the computer. The doctor must then show you his before and after photos to prove that he can actually accomplish what he draws on the computer.
In your case in particular, you need to find a surgeon who understands all of the issues I mentioned, and how they fit together, and who can actually accomplish them in surgery. 

The areas that concern you
can be realistically cosmetically improved with an artistically performed natural appearing rhinoplasty.
Keep in mind that following
advice from a surgeon on this or any other website who proposes to tell you
exactly what to do based on limited two dimensional photos without examining
you, physically feeling your tissue, assessing your desired outcome, taking a
full medical history and discussing the pros and cons of the operative
procedure would not be in your best surgery. Natural appearing results need to
be individualized and what is appropriate for one patient is not necessarily
the best for someone else. I would suggest that you find a surgeon certified by
the American Board of American Plastic Surgery and one who is ideally a member
of The American Society for Aesthetic Plastic Surgery (ASAPS) or facial plastic
surgeon (otolaryngologist) that you trust and are comfortable with. You should
discuss your concerns with that surgeon in person.
Robert Singer, M.D., FACS
La Jolla, California