My vote is on Melee Barb, got a great deal accomplished with mine. You can get both axe and sword skills if you dual-wield, but I'd recommend sword and shield. Whirlwind made a lot of Ubers significantly easier with life-on-hit, and I personally got mediocre defense without a shield. Barb also has Nephilim Spirit, gives you a great deal of rainbow damage. Though I haven't used Paladin since XVI, and that was Unholy Melee, so I can't vouch for how bad/awesome Paladin is.