I don't want a real time video compositing tool, I want a tool that records (one window, one region of the screen, or one capture device) at its native resoluti

I don't want a real time video compositing tool, I want a tool that records (one window, one region of the screen, or one capture device) at its native resolution. And ShareX (a Windows-only screenshot tool) manages to achieve the first 2 with a better UI than OBS Studio (though possibly with lower performance), though OBS Studio recently added "Resize output (source size)" which makes OBS's UI substantially smoother for this use case.