Board Thread:General Discussion/@comment-222.153.6.177-20141008141428/@comment-75.54.81.45-20150817141642

even if you get your pickpocketing to 100, the perfect touch perk does not affect essential NPCs,

other than that there is no hope for you, sorry :(

The only ways are as you said, killing ulfric and looting him , or completing bound until death so that she can either be Perfect Touch Pickpocketed or  murdered.

I'm going to get my set by killing ulfric, because I'm a legionnaire at heart. :)