My advice is to wear sunscreen.
😉 https://www.youtube.com/watch?v=MQlJ3vOp6nI
For your build:
With a non 'K' series CPU a 'Z' series motherboard is probably an expensive waste of money, unless it has a feature not available in the less expensive 'H' or 'B' series 'boards you can't live without.
No 'B' or 'H' series motherboard will run memory faster than DDR4 2666, it will run fast memory perfectly, just at a reduced speed.
With so many 'boards to choose from I cannot give a single recommendation, and since you're not going to overclock things like VRM ( motherboard CPU power regulation circuity ) quality isn't an issue.
Make a list of things you need and look for 'boards than have those features, although high end features like...