What's the best origin/class for a melee dps?
Noble Adventurer imo is the best melee class, even if it starts off slow as soon as you get past the first act its self-supporting aiblites are ridiculous. At some point I ended up fighting enemies with just my own character as all my other characters died in the first few rounds because due to no health. But by that Time I would have already stacked defense and become an unkillable death machine.
But if we're talking pure DPS, Dairokutenmaoh is correct about the swashbuckler, I haven't tried the Templar fully because the first time i did the game hit 3 or 4 game breaking bugs before I even got a few hours into the game, so there might be something there. But Swashbuckler seems okayish.
In regards to origins, I choose Noble for empathy due to extra dialogue, although I can't remember if there is that much at all. Explorer also looks pretty good but I never start with it, still better than the other ones which are just buffs. In my opinion secrets are a million times better than buffs in a game where you don't even need to grind that much at all to reach the end. I mean apart from those quests that make you grind...