When I say underrated, I mean people who because of their abilities and skills should be much more important than they are.
Like for example:
Warpath: On paper he is a beast. Heightened senses, 25 - 50 ton strength, super speed, agility, reflexes, endurance, toughness and stamina, has been trained in combat and tracking by Cable, Wolverine, the Apache nation, and others, on top of that he has a pair of vibranium knives.
In the end though they do not really do anything with him. Hell they even just threw out the idea that he could fly.
So much potential just wasted.
Who else do you think is highly under rated?