Erikur is one of the biggest assholes in this game. He's rude, disrespectful to everyone around him, has a bosmer slave tortured for refusing to have sex with him, and to top it off, he's essential.

I want to see him suffer. Maybe the Dragonborn calls him out at court over the bosmer and Elisif has his ass tossed in jail to be Sybille's lunch. Or maybe ambushed in a dark alley. Whatever happens, it needs to be slow and painful.