What's wrong with Durance? Especially now that you can respec for a trivial gold cost.
Pally/fighter might be too much defense. At the least, I'd spec one of them more offensively. Fighter can single-tank if he specs hardcore defense, but it's probably not worth what you give up.
Maybe something more like fighter/"tanky" priest/rogue/control-mage? Priests can totally get away with wearing armor and don't really need to spec into their support stuff to be darned good at it, so you could probably get one to off-tank when need be.
Rogues really are absurd single-target damage. Way moreso even than the Hunter. Demands a lot of micro, though, and the going is rough until you get some of their escape abilities. I'd want one in a four-person party though for sure, just to keep the damage up high enough.
Druid might actually be better than rogue in this setup. With the mage more interested in control you may run into some issues with not having enough elemental damage for things that are heavily physical-resistant, and shapeshifted druids do near-rogue damage.