Rudy saving Jane from the collapsing Volcannon Trap. In the remake, it appears to be a Heroic Sacrifice, until it's revealed that Jack used his Accelerator to save Rudy!
Magdalen gets one in Alter Code F, when he joins the battle by non-chalantly tossing his coat on Alhazad, the Quarter Knights' second-in-command.
Right after body-charging Zeikfried off a platform towards a black hole, Zeikfried ensnares Rudy's left arm with some kind of metal cord, and nastily gloats to Rudy about how they're not so different and how if he goes down, he's taking Rudy with him. Rudy's response? He blows his freakin' arm off with his BFG (cuts it off with his sword, in the original), saving himself (though incapacitating himself as well, obviously) and letting Zeikfried fall into the void. It's one of the biggest "holy SHIT!" moments in the game, mitigated slightly by the terror you feel for Rudy...which only increases when you then discover he's an Artificial Human, possibly vindicating Zeikfried's statements...
Cecilia gets hers when she enters Rudy's mind while he's in a coma (from the above injury and the resulting surgery). Discovering he's being tortured by a nightmare-inducing demon, she proceeds to completely destroythe CRAPout of said demon, and pulls Rudy out of his coma with The Power of Love. Ladies and gents, this is why the Rudy/Cecilia ship exists.
Asgard vs. Barbados in ACF: So awesome it gets its own FMV as Barbados attempts to destroy the party with its Kill Sat attack, only for Asgard to erect his barrier and shield the party while they fight Barbados. At the end, there's another FMV where Asgard delivers the finishing blow and utterly annihilates Barbados with the Phase Distorter.
Whenever Asgard does anything it's bound to be awesome.
Boomerang fights his way out of Hell just so he can enjoy one last fight with the party.
This is to say nothing of his cool, collected nonchalance when facing down a horde of demons (Or an empowered and very pissed off Berserk in ACF) with only his faithful wolf by his side. "Come, Luceid. You and I are going to take a little trip to Hell together."
