TKL's are the way to go for you. I recommend the Cooler Master Masterkeys Pro S. Or if you even want to go smaller, check this one out: https://www.amazon.com/keyboard-One-Handed-Mechanical-Keyboard-SADES/dp/B07D6NTPWH That would be even smaller than the TKL keyboards. But you will miss some...
Basically what ryan said. I got no idea however why people would want that. Considering that you got a whole pc next to you. Might be for those type of setups that have their cases pretty far away from them.
As far as i've seen, the gram spectrum from tesoro is one of the smallest out there ( excluding the ones currently being developed which are even smaller)