If the game of the film of the comic book is anything to go by, the Fantastic 4 really aren't that fantastic. They're just OK.
Reed Richards (or 'stretchy man') is good at punching, Ben Grimm (or 'the big one with dried-on cornflakes for skin') is even better at punching and can also pick up large objects.
Susan Storm (or 'the sexy one who can go invisible') can use telekinesis to throw people about and, naturally, is quite decent at punching. Then there's Johnny Storm (or 'fire man'). He can ...