Brian Tyler is good. I listened to some of his work, and they were good. If you listen, you can kinda hear Jerry Goldsmith-style in it, which is weird, since he has done sequals to movies Jerry has done (Alien, Rambo) and replaced Jerry for Timeline.
NOTE: Aliens also used music from previous movies (remember when Ripley and Newt were stuck by the elevators ? Same music from Alien when Ripley left Jones after seeing the Alien at the end.).