Do you know what is so epic about this list, it's because it's not about one of Monkey Island™ games, but all of them, including the new one TMI™. The few ones I remember are only from Curse of Monkey Island™
So in Curse of Monkey Island™ did you try...
giving the arm back to Murray
using the ventroliquisim book with every one you meet
giving some gum to Murray
putting the pin on the vodoo doll again
using the burning piece of wood with the vodoo doll