Fredegar Bolger will stay near the camp and defend it against attack

Weapon Toggle (Rock/Sword)
Elven Cloak
Shank (a critical strike)
Peregrin for Gondor (Pippin gains armor and attack boost)
Level 10.Pippin the Troll Slayer (Instantly kill a Troll)

Weapon Toggle (Rock/Sword)
Elven Cloak
Shank (A critical blow)
Meriadoc the Magnificent (Merry gains an attack and armor boost)
Level 10.Mount

Weapon Toggle (Rock/Sword)
Elven Cloak
Shank (a critical strike)
Samwise the Brave (Sam gains an attack and armor boost)
Gift of Galadriel (Summons a forest to provide cover and an armor boost to units)

Weapon Toggle (Sword/Rock)
Elven Cloak
Mythril Coat - Frodo gains a large armour boost
Phial of Galadriel
One Ring
Shank - A heavy blow

Weapon Toggle (Sword/Bow)
Dunedain Cloak
Wound Arrow
Level 4.Kings Favor - selected units gain experience
Level 4.Leadership - nearby units get an attack and armor boost
Level 10.Standard of the King - Plants a banner that gives nearby units an attack and fear resistance boost
Mount
Stealth

Weapon Toggle (Sword/Bow)
Dunedain Cloak
Wound Arrow
Level 3.Scavenge - kills give resources Level 5.Sabotage - A blow that stops resource production (Sword only)

Wizard Blast
Level 2.Leadership (nearby units gain an experience,attack and armor boost)
Level 5.Istari Light
Word of Power
Mount
Gandalf the White (Triggered by the spell)

Hey Ho,Tom Bombadil is summoned from the spell Song for Tom Bombadil.
Auto Heal
Be Gone - scares away nearby enemies
To the rescue - Tom travels instantly to a location

Tom Cotton stays near the camp like Fredegar and defends it

Rosie stays near the camp and helps out,she doesn't fight though
Auto Heal
For Rosie - Sam gains a large attack and armour boost when near his gal