No, don't want anything specific to happen to him.

I really don't understand the "good guys must have total and complete victory over the bad guys" mentality.
... why?

Is this some kind of attempt to make up for reality where nothing of the sort happens?

I like stories where it actually seems like the villains might win. And I mean there is an actual possibility they will win not a Hollywood possibility where it is always "certain" that they will win right before they are defeated.

And yeah, he's definitely a fun character.

P.S. I admit I skimmed this thread, but a lot of people seem to be assuming life will be better for the people in Tarquin's kingdom with him dead. This does not seem at all clear cut to me. A lot of things could happen to the kingdom and indeed the continent if he just dropped dead right now.