Geirrhafa against every boss could be interesting. I think he does a surprising amount of damage with his ice breath attack. Could end up out dps-ing some of the later bosses.
Hey Karat, I had a idea for a video. Tremorzilla vs giant bosses (Like Redstone monstrosity, jeb_, Reanimated temple, Crude Redstone Monstrosity, Cyber Monstrosity, Ancient of Prismarine, The Giraffe, The Wicked Giraffe, Brachiosaurus from unusula prehistory, Paraceratherium from unusual prehistory, Devastator, Leviathan, Ancient Remnant, Void Blossom, Hydra from twilight forest, Stage 5 dragons, Atlatitan, Luxtructosaurus, Fallen Icon, Returning knight, Monarch of chaos, Mega Spud, Knight Garent, Cyclop, Sea Serpent stage 3, Death worm stage 3, Unusula prehistory T rex, Armored T rex from the dawn era, Lava Launcher, Vanilla giant zombie)