Also, during his execution, he performs some sort of ritual to try to save himself, making him one of the only, if not THE only culprit who actually had a chance to save himself. It doesn't manage to save him, but winged animals are seen carrying him off somewhere afterwards, so maybe it did something.
It becomes quite ironic when during his execution, he is clearly lifted away to heaven.
Naegi, Kirigiri and Togami in their Big Damn Heroes arrival in the final act. Some of the biggest damn heroes in the whole series.
Hinata's Awakening. Even better, the Mastermind wasn't expecting this in the slightest.
He then proceeds to snap out of his Heroic BSOD via Non-Stop Debate against his own despair.
Hinata and Nanami destroying AI Junko's argument.
Monomi standing up to Monobear. It doesn't work in the end, but that doesn't undermine the sheer heroism of the act by one bit and proves the character's sincere devotion and willingness to stand up and fight for her "students" no matter what it takes.
You got to admit, despite being batshit insane, the fact that Komaeda played Russian roulette with only 1/6 of a chance of coming out alive and still pulling it off was pretty awesome. Expect nothing less from the Super High-School Level Good Luck.