Nope, what you do is create a damage armour and calm humanoid spell, or an enchanted item that can do that and cast it on him. If you use chameleon to attack him he will still know and pwn you Then you pickpocket him, the only thing about this is that it takes thosands of casts, so it will literally be faster to play the expansions or pass him on the main quest and kill him.
Edit: it will only ruin the story if you kill him before you get cured from curprus
Oh yeah, I totally forgot about calm humanoid spell. I don't think it's going to be thousands of casts because I used spellmaking from an npc and increased from low points for Disintegrate spells to 100 points. That's why I created too many potions for magicka. I actually did that to Divayth Fyr before. I started to think that it may be a bad result like ruining the story or happiness. Thank you guys for answering. I will do it again.
I plan to try the expansions someday.
Misc skills don't earn you exp to level up. If you're really stuck, just go to jail multiple times so your skills diminish, then learn them again. Levels you up.
My character really never goes to the jail. My friend told me that it's a bad idea about going to the jail