I recommend an RTX Aero 4080 from Gigabyte

I can recommend the AsRock 7900 xtx taichi oc edition. It has a very good value for money! But it also costs about 1150 francs.

With the graphics card, it depends on what you want to do with it and what resolution the screen has. A processor with graphics chip onboard is also possible; it also makes sense if the performance of the graphics card is coordinated with the processor. With this information it would be possible to make a suggestion.