I have a steelseries apex pro with an additional USB port. It doesn't have a hub, it is a separate port and the keyboard cable has two usb-a male plugs on the end.
I remember years ago having an apple keyboard that had a usb-a female on the side for the mouse. It wouldn't boot up with my mouse though, I suspect keyboard+mouse drew too much power. I had to run the mouse separate.
The steelseries apex pro is awfully pricy for that kind of keyboard. For budget-minded fans, as far as I can tell so far the Royal Kludge RK84 is the only decent keyboard with a usable USB hub, but it's cheap plastic chassis and keycaps are quite the turnoff.
Hopefully something decent shows up in the market that mixes the best of mechanical keyboards with the very basic user experience of using a laptop.
I remember years ago having an apple keyboard that had a usb-a female on the side for the mouse. It wouldn't boot up with my mouse though, I suspect keyboard+mouse drew too much power. I had to run the mouse separate.