Ranged.

When Bard the Bowman makes a ranged attack, the enemy he attacks gets -2 until the end of the phase.

Now he shot with a great yew bow, till all his arrows but one were spent. –The Hobbit

Sentinel.

Reduce the cost of the first Rohan ally you play from your hand each round by 1 (to a minimum of 0).

"Arise now, arise, Riders of Théoden!" –The Two Towers

Sentinel.

Response: After Beregond defends an attack and takes no damage, reduce the defending player's threat by 1. (Limit once per round.)

“The Lord does not permit those who wear the black and silver to leave their post for any cause...”
–The Return of the King

Sentinel. The first player gains control of Aragorn.

Action: Spend 1 resource from Aragorn's pool to ready him. (Limit once per phase.)

If Aragorn leaves play the players lose the game.

“As I have begun, so I will go on.”
–The Return of the King

Response: After Éomer commits to the quest, spend 1 resource from his resource pool to immediately declare him as an attacker (and resolve his attack) against an enemy in the staging area.

...he was young, and he was king; the lord of a fell people.
–The Return of the King

Gimli gets +1 for each damage token on him.

Ranged.

Response: After Legolas participates in an attack that destroys an enemy, place 2 progress tokens on the current quest.

Action: Raise your threat by 1 to ready Boromir.

Action: Discard Boromir to deal 2 damage to each enemy engaged with a single player.

Action: Pay 1 resource from Glorfindel's pool to heal 1 damage on any character. (Limit once per round.)

Sentinel.

Lower the cost to play Weapon and Armor attachments on Beregond by 2.