I have dual-boxed a pally + warrior. The key being the warrior as the 2nd and using Charge - this way, the warrior is hitting the target with little need to run around and position both your meee chars. However, if you are too close to the enemy when you start the fight, you will have to do the "melee dance" to get everyone in position. I wouldn't recommend this as your standard dual-box team - only in special cases such as a carebear situation.

You can of course replace the pally above with any melee class.