Passepartout gets a lot of rather awesome moments:
Rescuing Aouda by standing in for her husband's corpse. Let's assume he was a really good actor.
Refusing to help Fix after the detective reveals his suspicions: "I have been, am, in his service. I have seen his generosity and goodness; and I will never betray him - not for all the gold in the world. I come from a village where they don't eat that kind of bread!"
Climbing under a train being attacked by Sioux Indians to detach the locomotive.
From the same section, Aouda defying the expected Neutral Female role by taking up a gun and scoring several good hits, and Fogg organizing several soldiers to find Passepartout and the other captured passengers.
Fogg buying the ship in order to burn it:
"I have sent for your, sir, to ask you to sell me your ship."
"No! by all the devils, no!"
"I shall be obliged to burn her."
"Burn my ship! A ship that is worth fifty thousand dollars!"