Best non named character to lead ICC

I’m playing a small narrative campaign and wondering what hero should lead my ICC (and also be my warlord). I like the idea of the Librarian improving their survivability, the chaplain adding +1 to wound, and I’ve seen those discussed elsewhere. I haven’t seen any recent discussions on these or the captain though. I don’t have enough points to take many characters in this first battle, and since it’s a campaign I don’t want to take a names character.

Thoughts on captain vs Chaplin vs librarian?