I took Lefty Lucy's Deadly Fortress build and added the passives i would take. Based off of:

http://forums.elderscrollsonline.com/en/discussion/213099/build-update-2-1-stamina-dk-tank-dps-for-pvp-pve

Brought a DK to vet 4 on this build, good tank if played right with the right gear.Look for detailed strats in the link above. Add me @Aethro. Advice and changes appreciated, I am by no stretch of the imagination a pro at this.

-Undaunted passives are a must. Medium armour passives not so much unless you switch to at least 3 medium.
-Green Dragon Blood can be switched with Vigor/Resolving Vigor (Assault tree)
-Werewolf is NOT a must for this build, I just happen to be playing as one
-Volatile Armour can be switched with Immovable if you have enough stam OR Igneous Shield/Power Slam
-Evil Hunter instead of Wrecking Blow
-You can add 1 or 2 more Medium Armour instead of Heavy
-Either of the Dragon leap morphs instead of Dawnbreaker of Smiting if you don't have high enough Fighter's Guild
-Lefty Lucy recommends Imperial race but I play as High Elf and I'm fine so far.

Notes:
This is my PERSONNAL build variant and only goes as far as the very near future with this build, I will change this as I get higher level and gain more experience with the build.
Comments appreciated.
Viable for 2.1(testing for One Tam)