Ill go first to illustrate what I mean. Ill be using some Elder Scrolls classes/archetypes as a guideline for a few of them
Prospector/Scavenger
Any, Prospector Pete
Guns, Repair, Barter
Shovel?
Fortune Finder, Scrounger
Caravaneer
Cass, Roving Traders
Barter, Speech, Repair?
Caravan Shotgun
Long Haul, Pack Rat
Country Doctor
Doc Mitchell, Ada Strauss
Medicine, Guns/EW, Science?
Pistol
Living Anatomy, Life Giver
(Former) Military Officer
Colonel Hsu, General Oliver, Colonel Moore
Guns, Speech, ???
Rifle, Pistol
Ferocious Loyalty, Grunt
Infiltrator/Assassin
Vulpes Inculta, Christine
Guns/EW, Lockpick, Sneak
Sniper Rifle, Silenced Pistol, knife
Silent Running, Sniper, The Professional, Mister Sandman
i think you get the idea, before I post some more lets see some more from you and some discussion on others