One of my favorite keyboards for a very long time was made by Cirque (the inventors of the Glidepoint trackpad) and was called, as near as I can tell, simply the "Cirque Glidepint Keyboard."[0]
It was a pretty normal 101-key layout, with mechanical clicky-switches[1]. Except, in place of the inverted T arrows was a small-ish Glidepoint. The three buttons for the touch pad were near the front edge of the keyboard, on the far left -- near Ctrl and Alt.
It lived clamped into an example of one of the old-school sliding, articulated, heavy steel keyboard-holder-widgets under my desk, and I almost never saw it.
Instead, I'd be typing and using GUIs with my desk completely free of input devices and ready for every other manner of thing that desks are useful for, with my hands under my desk just above my lap. My right hand barely had to move to reach for the pointer (I even got good at using it with my pinky finker), and it felt completely natural to use my left hand for the pointer-buttons (rather than the hateful contortions required by more-modern touchpad implementations).
It was very, very quick to use in those fairly early days of useful GUIs on desktop PCs, and the lack of inverted-T arrow keys was never problematic for me at all since I grew up with a near-clone of the IBM Model F's layout -- the Chicony KB-5160.
And man, that arrangement sure was comfortable.
[0]: I cannot find a photo of of the old Glidepoint Keyboard, and I strongly suspect that very few of these were ever made. I did find a review, though: https://www.chicagotribune.com/1995/09/08/cirque-glidepoint-...
[1]: I do not know who made the switches. Sorry, mech keyboard fans.