Count Haringoth.
I helped his villagers and I got negative relation towards him as a result.
I saved his ass in battle a couple of times, got back into positive relations.
Then when I joined the Swadians I ended up having to rescue him, twice, from enemy holds. Not to mention the
5 times i've had to rescue his son Count Regas.
When I began to be a big player in the Swadian court I was given approval to visit and then marry his daughter, to which he arranged the wedding after asking for 16k denars from me.
About a week later he defected to the Khergits, taking my money and my future wife with him. Then whilst I was in Praven he raided my village (Why was I given Rduna...).
He remained in the top 3 of my relation to Lords list throughout all of this.
So I attacked his castle and took it for the Swadians. Then I searched for him. I found him eventually, this time besieging my fief of Uxkhal (That bastard). He then had the
cheek to say i'd 'been trespassing his home'. I fought him (Somehow he had 190 troops, including 35 Swadian Knights and 40 sharpshooters, jesus christ

) and luckily with my ~100 Knights and Men at arms I defeated him, but he escaped. Then I found him again a month or so later, when he was in Narra with a depleted force. I besieged and took Narra, but he escaped again.
He's now my sworn enemy (Despite still having a +25-30 relation with him) and i've made it my duty to destroy the Khergits until he has nowhere left to hide. He is the only exception to the rule that I release prisoners upon the offer of a ransom; I will lock him away in my tower and put him behind a thousand man garrison, just out of spite.
Screw you count Haringoth (Or Haringoth Noyan as you call yourself now). I'll not just confine this hatred to this game; every single save I will hold you to account for your douche-baggery, you will always be enemy number one.