Alternative to killing mods I found(allows nice guy combat hah)

[tyrel68]

NPC Knockout Overhaul by Sevencardz and Noobzor

http://www.nexusmods.com/skyrim/mods/52681

 

Fight or fly by kuertee

http://www.nexusmods.com/skyrim/mods/15223

 

One allows the ability to knockout temporarily in stealth and combat, major thing is you CAN knockout essential npc's

 

Second one fixes the yield issue where they say I yield and start attacking again. Now they run away and if you catch them they will give you their items.