I just got done compiling all of my OPL3 instruments into a pack of just over 300 patches with everything neatly organized into folders. It has a decent variety of sounds ranging from gnarly basses, drums, powerful leads, some really weird sounds, and a handful of SFX. If you've heard my OPL3 music before, then you've heard these patches. It can be downloaded here.
Anyone who uses Tildearrow's Furnace Tracker will be able to use them with the OPL3 chip. Not all of the patches rely on OPL3-specific features so a lot will work on OPL2 as well. I hope it can help fellow chiptune artists who aren't as familiar with FM Synthesis as I am but still want to play with the wide variety of sounds it is capable of.
I plan to make a patch pack for my Sega Genesis patches as well but that will be an even more tedious undertaking as I have more than double the amount of Genesis patches than OPL ones. I also plan to compile some of my favorite patches from other stuff like the NES, mostly being some interesting drums and my favorite sounds as I have far few instruments for other systems.
Have fun!