Deadman vs. Promised Pain is easily the hardest match for me so far. Which I prefer of the two pretty much depends on the day. I think in my favourites bracket I had Deadman as winning, but today I'm digging Promised Pain more, so...
Super Mario Galaxy - Gusty Garden Galaxy
Xenosaga Episode III: Also sprach Zarathustra - Promised Pain
Persona 5 - The Whims Of Fate