Why not two full floors with a gable roof?
https://www.hausbau-forum.de/threads/efh-für-4-Personen-Meinungen.34437/page-27
We are currently continuing the discussion here because I specifically opened the thread for the attic windows. Yes, the next step would be two full floors. In the end, however, it is a gut feeling decision whether you prefer one or the other.