FMDrive's sound quality is solid and it has great features, output filtering included. Unfortunately, everything is obscured behind an extremely obtuse (yet admittedly pretty) UI, so I can't really recommend it. SPSG is a nice SN76289 plug, and is far more usable.
RYM2612 is my #1 recommendation as it's lightweight and well-designed. Toggles for original output filtering, DAC audio in, and every FM parameter is up front and visible at all times. It's also 50% off at the moment - the code is right under the price! (https://www.inphonik.com/products/rym2612-iconic-fm-synthesizer/)