#2 Robert Lewandowski (Poland, Bayern Munich)
Goals Scored this season - 13
If Manchester United do decide that cash is not a constraint, they need to look no further than Robert Lewandowski. While he has not been prolific so far in the league this season, the Polish Striker has a phenomenal record in front of goal. Last season, Lewandowski scored 41 goals from 48 games in all competitions, including 29 from 30 matches in the Bundesliga. In fact, since the 15/16 season, the Striker has hit 40 goals every year without fail.
This season, Lewandowski has 5 goals from 9 games in the league but has managed 13 goals from 15 games in all competitions already. He is a proven goalscorer and has the experience that United requires at the top of their attacking spear. The striker is still only 30, so he does have a few good years ahead of him, and can help young strikers like Rashford flourish under his guidance.
The problem is that he will not come cheap, as he is currently valued at £72m and Bayern will be reluctant to sell. His arrival would also most certainly mean the end of Lukaku's tenure at United, however, the two could be used in tandem to push each other to perform better.