What combination of classical instruments sounds the most like a synthesizer?

As a few of you may know, I like to compose “music” in my spare time. This leads me to my question:

Out of all of the classical instruments, what combination of them will sound the most like an electric synthesizer?

Classical instruments include flute, oboe, clarinet, trumpet, bassoon, tuba, etc., along with violin, cello, etc., along with snare drums, bass drums, marimba, cymbals, etc., and piano.

Before you say that it cannot be done, there must be some sounds that replicate it better than others, and I am asking for the best out of those.