I'd like to throw warlock in the mix. Consider drow, blade pact, Devil's Sight, Eldritch Smite, Elven Accuracy. Roll 6d20 on two whip attacks out of your own magical darkness (duration: ten minutes). Utilize misty step / thunder step to get in and out of danger. Smite targets whenever you land a crit, dealing double smite damage and knocking them prone (your allies will appreciate it).

Hexblade is an obvious but unnecessary choice. There are plenty of useful features and spells among other patrons.