The problem is that macOS killed off subpixel anti aliasing, which is important to making text look good on 110ppi displays. So 220+ ppi displays are the only real option here.
Yeah, using non-Apple monitors with a mac is a pain. Try "Retina Display Manager" - https://github.com/avibrazil/RDM - as it allows you to switch to the sharper HiDPI resolutions supported on your monitor.
