At the end of the day, a striker's job is to score. Whether it's tap-ins, 40 yard screamer, or dribbling through 8 players before scoring.
I would take Harry Kane before Morata, Belotti, Lukaku, Lacazette. But, realistically, I would be happy with Lukaku because he's going to score goals. Just as long as we have somebody who can put the balls in the box, I trust him to finish them off. More so than Costa.