I personally recommend the Shattered Flail from the Gnoll Boss + Periapt of Wound Closure. It's a rock solid +2 one hander with an occasionally iritating drawback that lets your melee straight up solo many fights.One thing I haven’t particularly cared for is how sword’n’board is hard to pull off, given a dearth of long swords above +1 (hadn’t found a single +2 by Harper hideout).
A hasted Fighter can easily regain 36 HP on an action surge at 5th Level. Berserker can get 30 HP. Ranger with Hordebreaker can get 36 HP, and Ranger at 11th with Whirlwind can get... uh... 100+ HP, especially combined with Black Hole.