I use one of these power buttons for my PC. They plug into your motherboard and replace the switch on the case.

https://www.amazon.com/gp/product/B076CWLVS5

Everything is on one of these surge protectors that turns outlets on and off with the PC.

https://www.amazon.com/gp/product/B0084DFKPU

I just hit my power button and everything turns on. When I power off the PC everything turns off.