Loricatus is great if you're having bad luck with scrolls. Not only does he harden the iron chain of materials, there's the odd enchantment and, even more rarely, scrolls of hardening/enchantment. As well as the fact that you can make use of him even when he doesn't like you
Mellis is quite handy as well. With the free bottle/can refills there's the odd chance you'll get stat-improving stuff. Not to mention you'll never go hungry. If I remember aright, he also fixes broken bottles and regenerates bananas if you have the peels.