Benteke isn't overrated. He's had basically no service whatsoever all season and a bad injury to come back from.
Look at the goals he scores, overhead kicks, long range shots with both feet, dribbles, leaping headers, diving headers... then the assists as well. He scores goals only the great strikers can score.
He just needs to play in a side that creates under a manager that can motivate and he will do the rest.