Diode Milliampere rules. I nearly soiled myself when the drop came on this track of his:
https://www.youtube.com/watch?v=EtYOZRarQDs
There's a lot of really cool stuff in the tracker/chiptune scene with people making music nowadays not explicitly for a video game. Savaged Regime probably knows the YM3812 better than the layout of his home:
https://www.youtube.com/watch?v=RqWR_RjvNzk
naruto2413, best known for "Artifical Intelligence Bomb" and more focused on PSG sound chips, also does some cool stuff with Yamaha chips:
https://www.youtube.com/watch?v=WeXCoeVdM68
Here's one that's straight up a 1970's anime OP, complete with lyrics specifically about FM synth:
https://www.youtube.com/watch?v=vQW14UX_Rn8
My girlfriend Noyemi is way into this shit too, specifically making stuff with Music Macro Languages like PMD (Programmable Music Driver). These are interesting because unlike composing music in sheet-like notation like in a tracker, it's described with macros and commands, like a markup language. This lets you do cool shit like have separate lengths for your rhythm, melody, etc., meaning shit can loop for a long time without actually sounding similar.
https://www.youtube.com/watch?v=jKjoIe-U_nM