Fury Warlock?
Come on, you've all done it at some point. You've hit the baddie with your staff, right there in the 'below 1%' of health. You've killed baddies that way. Surely I can't be the only melee warlock around, right? Proof:

So here's a wish (if by some miniscule chance someone at Blizzard read this). Could we please have a melee warlock build?
I like hitting baddies on the nose while they're on fire, or going through the late stages of Terrible Afflictions, or just went totally insane when a demon rammed a fist in their midriff and yelled "muhaa!". It's like that final sprinkle of spice on a dish, or a coup de gras with much dark humor but no honor. One final punch from someone who looks like he or she never lifted anything heavier than a quill and it's bye bye time.
Try explaining *that* to your buddies in the Maw, at the monthly meet-up of Baddies Anonymous.