My go to for several dungeon events recenlty has been Dark Road Eddie; his passive and Bespoke work really well together (and he's coincidentally one of my favourite designs too). X Factor Eddie and Black Beard Eddie are probably up there as well although my newest 'favourite' is Phantom Eddie since becoming Awakenable - pretty decent stat scaling for a 4* and a good range of effects and attacks, plus he's AoE which is always a bonus. Quite easy to obtain through normal souls too, even if his Awakening shards are still relatively uncommon.