Sam, Son of Hamfast. He's a companion (at the very least a speedbump), an alternate Ring-bearer, and a burden remover extraordinaire. Look at him peeking over his shoulder! Eying Rosie Cotton, or sensing the approach of the X-list?
Other choices:
What Are They? - Once the roaming part is set up, discarding minions in the maneuver phase (regardless of wound/exertion prevention) is plain nasty. Counters are further limited since it's an event.
Goblin Scimitar - Costs

, draws a card, and gives strength +2 to a very lucky minion. But more than that, it combos with
Goblin Scavengers as the gift that keeps on giving, as well as
Goblin Armory to flood the twilight pool. In terms of its sheer power in the deck it serves, I think it earns a high spot in the list.