I am not looking for an entire game engine, nor any "game framework". I just want something that can render sprites and shapes in a window, without me having to deal with all the lower level plumbing of OpenGL, Vulkan, or w/e.
I would prefer something with hardware acceleration, though software rendering might be fine if the performance impact is negligible.
SFML uses OpenGL under the hood. So you have the combination of the performance and hardware acceleration of OpenGL but with the ease of use from SFML.