What is the BEST Gaming CPU For Area-51 Desktop

Here is a list of CPUs available for the Alienware Area-51 desktop from DELL. The i9-9980XE is the most expensive, but I have learned that this CPU is better used as a workstation CPU. I know the i9-9900K is the best gaming CPU out there, but there is no option to choose that CPU on the customization page for the Area-51 desktop. So all things considered, out of all the CPUs listed below, which one will achieve the best gaming performance? Thanks! Intel® Core™ i9 9980XE (18-core, 24.75MB Cache, up to 4.5GHz with Intel® Turbo Boost Max 3.0) Intel® Core™ i9 9960X (16-Core, 22MB Cache, up to 4.5GHz with Intel® Turbo Boost Max 3.0) Intel® Core™ i9 9940X (14-Core, 19.25MB Cache, up to 4.5GHz with Intel® Turbo Boost Max 3.0) Intel® Core™ i9 9920X (12-Core, 19.25MB Cache, up to 4.5GHz with Intel® Turbo Boost Max 3.0) Intel® Core™ i9 9900X (10-core, 19.25MB Cache, up to 4.5GHz with Intel® Turbo Boost Max 3.0) Intel® Core™ i9 9820X (10-core, 16.5MB Cache, up to 4.2GHz with Intel® Turbo Boost Max 3.0) Intel® Core™ i7 9800X (8-Core, 16.5MB Cache, up to 4.5GHz with Intel® Turbo Boost Max 3.0)