ᐅ Planning the Main Bathroom with a Wall-Mounted Installation System

Dear forum members,

Unfortunately, our architect made a mistake in a very awkward spot in the house, in the main bathroom upstairs, where in my opinion symmetry and harmony are especially important.
From the utility room below, the exhaust duct of the gas condensing boiler runs straight up the gable wall right in the middle of the room. This creates a protrusion in the center of the wall. The general contractor’s idea is simply to build a drywall partition up to the eaves side. This results in a “half” wall.
I have been trying to figure out the best way to conceal this area for some time.

On the adjacent eaves wall, the toilet and bathtub are to be placed (as well as a radiator).

I have simulated various options in 3D.
Basic idea:
The drywall partition should either be functional or visually appealing and not look like a closed “half” wall.
I would preferably like to create a shelf behind the bathtub. The drywall partition next to the toilet could be used to install a concealed cistern module. Furthermore, I would like to pick up the height of the shelf and also create shelving within the partition, preferably with shelves above, which are not shown in the 3D simulation—please imagine these shelves.
I have also simulated other options without shelving, as well as different arrangements of the toilet and bathtub.
Currently, I like option 1 or 6 best.

Perhaps you have a great idea on how to make the best of this situation.

Thanks in advance!