+1 for 8-core intel i7-7820X. (im pretty satysfied with my 8 core ryzen when using build in UE, it using 7 CPUs at max load)
i7-7700K is for gamers mostly.
YuLeven recommendations are good. if i have to change something, its ssd -> to 1 TB and ram 2x 16 gb (instead of 4x 8 gb)