Warlock do the most damage in World of Warcraft?

after their pet demon, and their DoT's then yes.

but they do not have up front unless you do melee, then they have mediochre health

i leveled with them to level 10 in 8 hours, but a human pally took me 6-7 for level 11. warlocks don't heal also, but they have stuff that transfers 50percent of their damage received to their demon pet.

Paladins heal, so i never died with them,

died ONCE (1!) time with warlock though so still pretty good.

get an orc warlock or a human warlock for easiest leveling at lowlevel to level 30-40