Bare-bones pdf viewer that works with Amethyst tiling (macOS)

I want to have a bare-bones pdf viewer like zathura or mupdf-gl which can display a pdf, tile successfully with the window manager Amethyst, and be navigable with vim bindings. I'm not wedded to any particular app or solution; advice of any kind is appreciated. I'm using macOS Catalina 10.15.2 and can't get this to work. When I try zathura, Amethyst will not tile properly: When I use mupdf-gl, tiling is successful but the document will not fill the window. I've tried reinstalling xquartz and mupdf and the problem persists. This problem does not appear on my friend's system running Mojave.