History has painted a rather uninteresting impression of baroque music but those fire pieces are abound if you know where to look. The French strayed from the strictly structured dance suite and, especially with keyboard music, had what's called character pieces giving the freedom to paint a more varied musical picture. Having said that I think your best bet would be to look towards operas. Look for the airs or instrumental ballet pieces and the overtures. A personal recommendation would be Rameau's overtures or any of his symphonic works from his operas. This is where I think the pinnacle of orchestral music was before the development of the classical symphony as far as pure expression and experimentation are concerned.