Redox, 9front, and Haiku may all interest you. Booting on real hardware will most likely be successful with a Raspberry Pi, or Thinkpad, those seem to be the m

Redox, 9front, and Haiku may all interest you. Booting on real hardware will most likely be successful with a Raspberry Pi, or Thinkpad, those seem to be the most common for these small OS's to target. Or you could boot Linux straight to qemu with your OS of choice. Edit: Or Alpine Linux running Sway may be a decent option, though it's definitely some assembly required.