What GPU to use?

Hi there, I am new to the community & had a question about what kind of GPU I should get to maximize performance out of my hackintosh.

I plan on using it for gaming & photo/video editing. I want it to be running smoothly & fast, almost equivalent to that of an actual Mac or as close as I can get. Any advice would be much appreciated!

I'll most likely be using Steam of course along with Adobe Photoshop/Lightroom & some other graphic editing tools.

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Specs currently installed:

CPU: i7-7700k

GPU: N/A

RAM: G.Skill Ripjaws V Series 16GB (2x8GB)

Motheboard model: MSI B250M Mortar Micro ATX LGA1151

Ethernet Card: N/a

Wifi Card: n/a

Case: NZXT S340 Elite ATX Mid Tower

Storage: Seagate FireCuda SSHD 1TB