Variant human - 5 levels of Fighter - Battle Master w/Archery fighting style & 8th level Rogue Assassin w/rapier & hand crossbow. Sharpshooter, Crossbow Expert, Sentinel and Alert Feats. With action surge I can get 5 attacks in a turn so 5 chances for sneak attack and Evasive Footwork, Trip Attack and Goading Attack maneuvers. +7 on initiative, +12 on Acrobatics, Perception, Sleight of Hand & Stealth. I can't be surprised and the advantage against any attacker who hasn't had a turn yet can be devastating with 3 or 5 attacks/round + Sentinel reaction attacks.