While reading your post, weight on the tongue was my first concern as well. I was about to recommend a flat back barn door set up, because you can get a lot of galley in a shallow space that way due to the extra height; but then I saw that you prefer a curved profile.
Tony is right, you can find a design that works for you and your needs, either by following what someone else has done (there are so many fine examples), adapting something to your needs, or by taking your time to work something out for yourself from scratch.
Then it struck me, that's exactly what I am doing. I liked the idea of the curved profiles but wanted extra depth in the galley so that I could slide my cooler under lengthwise and still have plenty of under counter space. Also, I didn't want to have to reach, bend, or hit my shins on the rear of the floor like can sometimes be the case on a long sloping TD profile. So I started looking at the Benroy profile. I liked the fact that they have lots of interior volume, and the galley counter can be very close to the rear, but they still can have some flat "slabs" in the profile that weren't quite as appealing to me.
So I adapted. I arched the roof slightly to give it some curve; and added a "bustle" to the rear of the hatch so that the hatch ribs aren't competing with the rear edge of the counter, giving it a nice pleasing curvy look. Not a tapering TD profile, but curvy and practical.
So why am I telling you all this about my camper? Because TPCE profile might just work for you. You could leave the top of the bulkhead where I have it and extend the cabin floor back under the galley counter to make room for your dog (that would preserve the galley hatch hinge point and maintain hatch height and coverage when raised), or you could push the bulkhead back, shorten the hatch and still have plenty of galley space. My floor length is 9 ft 8-5/16 inches. Call it 9ft-8. If you like it you might want to shorten the walls a little; since I am building using a hybrid method with vertical grain interior panels, I made the side walls a little taller than usual and stacked them on top of the floor, so the profile is around 51 inches as designed, but that can be easily altered.
Just saying, you've got options.
