Tweaking the Font?

Hi, the default Roboto font is boring me out of my mind and I’d like to change it.

In the past, I’ve done so by just replacing the font file in the OS, which worked well, but meant that it would reset after every OS update.
I’m considering scripting that with ADB to make it less of a pain, but figured I should ask, if there’s a better way.

I’m on LineageOS which has a font styling system, but it only applies to the OS, not the user-installed apps…