Raven, the Mercenary unit from the GBA Fire Emblem, may have been one of the single greatest non-lord units in that game.
Really? I never used him. I'll have to try him out next time I play that one.
Oh yeah. He has enough speed to double up most attacks, hits for large chunks of damage, rarely actually gets hit (even against spears), can rescue a large amount of the other characters, gets the use of axes at class change, and has a healthy amount of hit points.
His weaknesses? He takes a good amount of damage from magic...but he never actually gets hit by it. Especially if he has any kind of support with another character in effect.
Straight sick.