I was going to say the French army of 1805, but someone already said that (*Raises an angry fist to ArchDuke_Sven*), so I'll just go with another answer.
The NL army of 1813-15 wasn't exactly great or outstanding, but they were of a rather interesting complication. They were veterans of the French, Austrian, Russian, British and German armies, deserters, young volunteers, noblemen who received their commission or men who had risen trough the ranks (One lt. Colonel had even started as a drummer boy), supporters of the King who had followed him into exile or ex-revolutionaries who had chased him out in the first place (I'm looking at you, Chassé), and the nationalities are as diverse. Dutch, Belgian, French, Nassau, Prussian, Scottish, Irish, American, Danish, Russian, Swedes. The list goes on and on. I could continue, but I think you all get what I'm trying to say