

I guess at the very least I’ll single out my graphic drivers (Intel)?
You shouldn’t need to concern yourself about this until you’re looking to install X or wayland (at which time you’ll want to put VIDEO_CARDS="intel i915" or similar in make.conf—read the wiki to see which drivers match your specific chipset; my example stanza is for a Kaby Lake system). The basic drivers should autoload unless you compiled a custom kernel and left them out by mistake.
I like Aqualung. Works well enough for what I do. Has the slightly unusual feature of accepting LADSPA plugins. I don’t do much tag editing, but the basic functions are there.