Logitech M570

I recommemd logitech vertical or se deluxe vertical. Also u can try trackball mouse, I recommend m570 or logitech marbleman.

I would suggest using trackball mouse if you have limited right hand space. logitech M570 is really comfortable for example. But the major issue seems to be that keyboard and how it is too wide, you probably should look for narrower keyboard. Maybe you could find tenkeyless ergo board and use separate numpad on the left?.

I have been using an ErgoDash and a Logitech M570 trackbal. The tenting of the keyboard allows for yhe tracball yo be slid right under the right hand thumb so as to not have to move the hand, and the left right clicks have been mapped on the right hand keyboard keys, activated using a special layer.

There's even a third-party management utility ("solaar") that lets you change device settings and pair new devices with the unifying receiver. I use the M570 on my older computer and the MX Ergo on my new machine and I'm happy with both. Edit: I also use a Buffalo wireless receiver mouse on a laptop, and a cheap Elecom at work both work fine too. The only kind of device I've had trouble with are Bluetooth mice.