(Spoilers) Who is the worst person to have in your head?

This is really more of an opinion / discussion question. I brought it up on Discord but figured it was better off here. Which one is worse sharing head space with Lews Therin or with Moridan?

Actually, it just occurred to me that this might 1) Not be the right forum, or 2) constitute spoilers. Can someone please let me know if either of those things are applicable.

This is the right one, it's the 1-14 discussion so anyone here would expect spoilers through the whole series, maybe put in the top of the post that it has end of series spoilers if you're worried
I would think Moridan is worse because Lews is crazy but Moridan is evil lol

So I have to go with Lews Therin because he can seize saidin and potentially kill you and all of your friends like he did after the Battle at Lord Algarin's manor. Moridan can apparently give you the true power which is bad news but as far as we know you have to choose to use it. Moridin is also super emo, which is annoying. He is of course evil but also tired. That or Rand is making him tired. I was never very clear on that part. To me, having an evil person that makes you tired in your head is a worse consequence for using balefire than simply destroying the world. But it still doesn't stack up with blowing up everyone around you.