The Support Barbarian - Ancestral Guardian Barb with a hand crossbow, all dex and minimal Strength. The idea is that you use the Ancestral Protectors feature (which is based on "the first creature you hit with an attack on your turn" - notably, not a melee attack) to give all of your targets disadvantage on hitting people who aren't you (and you are running around away from them. When you're out of range of a creature to target with the crossbow, you use an unarmed attack to strike yourself, dealing yourself unarmed damage (1+Str) to keep the rage going (which is halved because of rage).

My other thing to do would be to add 2 levels of War mage Wizard to just about anything. Arcane Deflection, Tactical Wit, the Shield and Expeditious Retreat spells, and any amount of ritual spells for utility. I've flavored it as being supernaturally fast, having preternatural luck, as having high technology, as just general hero stuff. If you ever have a build that can spare 2 levels (even if your intelligence is 0 or negative), 2 levels of War Wizard are 100% worth it.