Why not? Aren’t there any bike shops near where you live?
IMHO this is really important to determine which bike is right for you. Typically, bikes by the bigger manufacturers are more conservative. I used to own a Cube Attain GTC SL Disc (2016): great specs for the money, but I hated the geometry. My experience with a Trek Domäne and Cannondale is essentially the same. BMC’s endurance road bike has a more aggressive geometry in comparison, which means it more readily turns into corners.
The most expensive bike in your original post goes for 2,750 € and you wrote the upper limit is 3,000 €. Biker24.de has plenty of offers in that price range.
- Cannondale Synapse (carbon frame, 105 mechanical): 2,300 €
- Cannondale Synapse (carbon frame, 105 Di2): 3,100 €
- BMC Roadmachine Five (carbon frame, 105 mechanical): 2,700 €
- BMC Roadmachine X Three (carbon frame, SRAM Rival eTap AXS): 3,100 €
- BMC Roadmachine X AL (aluminum frame, SRAM Apex): 2,400 €
I only selected those that were available in your size. They obviously offer cheaper bikes, and if you could also get a cheaper bike (aluminum frame and 105 groupset) and then replace the wheels, for example.