Lorien's wealth is pretty expensive, but three cards is undeniably good. I'm never happy when I have to play it because I usually don't have anymore resources to play the cards I draw. But in a Vilya deck, it's like Christmas.
Lore of Imladris is pretty reviled by the community and for good reason. It's expensive and inconsistent. However, in a Journey to Rhosgobel, it can make the quest infinitely easier. Besides, two for probably two or more healing isn't terrible, and if there's not much damage built up, it can sit in you're hand until you need it.
Gleowine (or, if you're matthew dempsey, Gleowinny), is a pretty good card. I don't know of anyone who actually uses that single willpower stat or the two hit points, but an extra card a round with no downsides is a pretty good deal for two resources.
Henamarth Riversong is probably the best (non-gandalf) ally in the core set. One for one and one is pretty good, but that ability crowns all! It pretty much shuts down the encounter deck in a single player game. If you're running a lore hero.... and not Henamarth.... you're doing it wrong.
Erebor Hammersmith is pure gold even outside of one of seastan's broken decks. Two for one of anything is good and three hit points to boot. His discard mechanic is just icing on the cake. If you're running Dain this guy becomes
two for a massive two, two, one, and three!