Years ago there was a nice small hardware from Roland called MT-32 (and later D-110 as rack version). this was a “cheap” multi-voice synth especially for getting good sounds via MIDI for a PC for games (e.g. Monkey-Island) (yes, there was a time BEFORE soundcards ). Now there is a software clone freely available (also I don’t know if there are original ROMs freely available):
Regards, Holger