Need help picking 4th for Quad boxing

I currently have 3 enhancement shammies, i'm looking for a 4th to lead the shammies. Dont want a healer. I want a class to take lots of damage since everyone loves to target the main toon, also CC'ing and other abilities to help aid my shamans is important.

So Pally,Warrior or DK Which would be the best fit for my group. keep in mind I do lots of pvp, not really arena ATM but bgs, tb just to get more familiar with the group.

Can anyone give me your opinion on pros & cons of the three choices.. Any help is greatly appreciated.

Thanks

I'd do a paladin... do prot and if you decide you "need" a healer... which you will you'll be set.

DK for sure. Brings good snares, good self healing, and ofc death grip!