Prince Imrahil is awesome!

He answered the call and brought the Knights of Dol Amroth.

He was the one who rode out to save Faramir and bring him back into the Gates of Minas Tirith.

With Faramir incapacitated and Denethor losing his mind and Gandalf preoccupied with Denethor, Imrahil was the one who stepped up and took over the defense of Gondor and led the men of Gondor out of the city to try to reinforce Eomer and the Rohirrim.

And he was immediately ready to relinquish whatever temporary power he had over to Aragorn even though Aragorn himself didn't really want it.

This man was instrumental!