Rtx 2080ti(maybe 2)
Asus zenith extreme
You should get MB, CPU, GPU, RAM, PSU, SSD...
Just get i9 9900k then you don't have to pay for heating.
MSI 2080 Ti Gaming X Trio - 1320€
i9 9900K - 700€
MSI MPG Z390 Gaming Pro Carbon - 180€
16 GB G.Skill Trident Z DDR4-4000 - 250€
be quiet! Straight Power 10 700W - 110€
Samsung SSD 960 EVO 1TB, M.2 - 260€
Rest for case and CPU cooler, too lazy to check what is compatible with i9 9900K already. Can go lower on RAM and switch to an Samsung SSD 860/850 EVO 1TB to save a few euros for the case/cooling.
Prices for Germany, might be lower or higher where you live.