Balfore
Explorer
They all have artifacts that make them immune to charm and fear...That would work. The rest of the party will freak out when the front line melee type suddenly stops fighting to eat a sandwich.....
If you are running a long adventure, instead of having the famine weapon directly affect the PC's, you could borrow an idea from Kevin Hearne's Iron Druid books. In one of the books, the titular druid annoys Hel, and she enchants her dagger so that everything she stabs with it develops an uncontrollable desire to eat the druid.
So I have to think of conditions outside 'the box'.
So, hunger (lol) will work
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