On which of these floor plans can we continue to build?

The "furnishing" of the site plan with small house symbols, terraces and driveways does not represent the building envelope, by the way, the OP would have more freedom there. Suggestions with nicer floor plans were made to him and would fit into the building envelope; finances are apparently not the issue, but he fears that a nicer house floor plan would lead to a less nice garden layout.

If that is the case, perhaps the complete garden planning should be finished first, to then have more freedom in house placement.
Just putting the cart before the horse. If the tail is more important than the head to someone – why not?

... namely that the employer envisions a home office of about 8 sqm.

Ah, so no adequate office means no home office. Understood.

... a carport would suffice.

Especially since with this huge lump you ruin the all-important garden. How about a discreet permit-free garden shed at the other end of the garden for garden stuff? – Or a cellar. The latter would clarify quite a bit here, I think. But apparently that is not enough.

just to say that the aspiring dream home of a fellow human being is "ugly".

Ugly, oh no. Just not Bauhaus. Note, not at all Bauhaus - neither modified, lean nor pure, and certainly not advanced - at best economy.

But these recurring stupid remarks or also the peculiar dick comparisons over there in the finance topics are just a pity and unnecessary.

I at most make car comparisons, and then I'll say something nice here: this architectural style fits a Fabia station wagon
And in the finance topics you at least don't run into me, that alone is enough relaxation for some OPs

If that is the case, perhaps the complete garden planning should be finished first, to then be freer in the house placement.

No no, he has no concrete wishes for the garden. Only, if the house left more space on another side, the view from there would be even more dismal (neighbors probably design the sides also with weak engagement).

Garage in the east Carport I would also find better I like the floor plan from Kaho.

I wasn't addressing you, your criticism is more subtle and different in nature, if you read here long enough you can assess it well and gain added value from it But scroll back a bit, the choice of words was as described...

Especially since with this huge lump you ruin the all-important garden. How about a secret, permission-free garden shed for garden stuff at the other end of the garden? - Or perhaps a basement. The latter would clear up a lot here, I think. But apparently that's not enough.

The plot is 16 x 23.xy, the building window 10 x 13.5 ...
I suggested to TE not to extend to the full width with the 10 meters, because then there really would only be 3 meters left on the left and right, east and west, which StanSch doesn't like. But he would have the maximum garden section to the south.
My suggestion would be to build a house of about 8 x 12, then you would have about 5 meters in the west. With a 5 meter carport for 2 parking spaces or somewhere a garden shed, lean-to house, for example in the east. That way you would also fully utilize the 9-meter edge development, but it would be looser on the plot because of the carport plus a lot of light through windows in the west.
Also, the floor plan of 8 x 12 would be more functional and simpler than 9 x 10.
StanSch has fallen in love with this 10 meters, plus a bit of paranoia about the nearby neighbor’s house, which leaves its west side in complete darkness and the fear of 3 meters on the east over 12 meters, although with his 10 meters he would have these 3 meters on both sides, of course less noticeable with a 9-meter-long garage, but in my opinion that just blocks the entire west side and is rather impractical, especially considering that a second parking space is planned.

But if it is to be that way, then the first floor plan is definitely modifiable. Although problems will arise again... just like with the garage, where you end up considering a slimmer building and a 5-meter carport again.