Thief Rogue 4/Swords Bard 6/Fighter 2 - Machine gun archer
Paladin 2/Swords Bard 10 - Big SMITE
Fiend Warlock 5/Eldritch Knight 5/Paladin 2 - Short Rest SMITE
Champion Fighter 11/War Cleric 1 - Lots of attacks, good with Sharpshooter or Tavern Brawler
Open Hand Monk 6/Thief Rogue 4/Spore Druid 2 - Bonkers unarmed damage Str/Wis
Wildheart or Berserker Barbarian 8/Thief 4 - Bonkers Damage and Survivability
Wildheart Barbarian 9/Champion Fighter 3 - up to 4x Crit multiplier and almost 50% crit rate.
Tempest Cleric 1/White Draconic Sorcerer 1/Abjuration Wizard 10 - Unkillable retaliation build
Necromancy Wizard 6/Life Cleric 4/Spore Druid 2 - Act 3 unkillable infinite Necromancy caster
Gloomstalker Ranger 5/Thief Rogue 4/Champion Fighter 3 - Stealth Archer
Tempest Cleric 2/Bronze Draconic Sorcerer 10 - Big Lightning damage
Hunter Ranger 11/War Cleric 1 - Act 3 Volley machine gun, pair with Punch Drunk Bastard for devastating results