Ahriman
Tyrant
But I do know that there are still some hidden modifiers in Civ4 such that you couldn't always tell what diplo level someone would be with you based solely off the sum of their numbers.
There are a coulpe that are hidden from you in vanilla (large/small empire, initial degree of antipathy - some leaders hate everyone more). But that's about it; you can see all the major ones.
BUG fixes that, and reveals the hidden data.
Yeah, you can't see the exact effects of all of them from XML only, but you can see all the variation across leaders.