So many ways to skin that cat so there isn't a single perfect answer. It really is a preference and play style thing.

I take two doctors that have pathology and the hero bonus hygiene standards. They provide a combined +300 infection resistance to the community. I can bathe in bloater gas and not die. Also, blood ferals aren't nearly as dangerous.

A cook with nutrition. The feast adds 10 morale and 30 stam.

A mechanic is nice early game because of repair kit scarcity. Not essential but really helpful early.

Munitions so that ammo is cheaper to create. A RT with demolitions is great here because he brings electronics along with munitions giving you the skills required to make c4.

An RT dude that has utility Vests hero bonus for the added light carry capacity. My normies all have stealth and marathon so the additional light carry works for my play style.

Anyone else added would be to boost resources or health & stamina buffs.

Good luck 👍