I'd use the board you see up at PCMR. Here's the link.
I think you know why I'd choose this one.
Other requirements are as follows:-
core__Ryzen 7 3700X
gpu__Msi RTX 2070 Super Gaming Z Trio 8GB
ram__G.Skill Trident Z RGB 16GB (8GBx2) DDR4 3600MHz
storage__3xhdd, 2xsdd, 1xnvme