"It's clobberin' time!"~ Thing
The Thing, also known as Ben Grimm, was a friend of Reed Richards who was caught in the accident that created the Fantastic Four - while the others remained relatively human he was mutated into a rock-like monster and he is very sensitive about that fact - Reed has promised to find a cure for Ben but so far has been unsuccessful.
Despite the tragedy behind the Thing the man remains a hero - famous for his battle-cry of "It's Clobberin' Time!" and being the resident strongman of the team he is the one most likely tearing apart a Doom-Bot or holding up a bus to save some innocents, of course he has a softer side too, despite his appearance.
Powers/Abilities
Thing is superhumanly strong and virtually immune to damage - able to fight against the Hulk for a while, he also tires slowly and can leap pretty far and high - probably due to his sheer size and strength. Also despite his rocky appearance the Thing retains the same agility and reflexes he had as an ordinary human and can catch unwary opponents off-guard, the Thing is also a highly trained pilot as he was a former test pilot in the United States Air Force and is equally well-trained in hand-to-hand combat with knowledge of boxing, wrestling, judo, jujutsu and street fighting techniques.