#1 Mohamed Salah

There is no doubt that Mohamed Salah is by far Jurgen Klopp's best signing, or probably one the best ever signings by Liverpool. Salah joined Liverpool from AS Roma in the summer transfer window of 2017, and what a signing he is proving to be. He is performing brilliantly and is currently the top scorer in the Premier League this season.
The Egyptian has already scored the most goals in his debut season compared to any other Liverpool player ever and is also on the course of beating the record of scoring the most goals in a single Premier League season (31).
Salah has won the Premier League Player of the Month award twice and the PFA Fans' Player of the Month award three times. He was declared the CAF African Footballer of the Year 2017 and was also selected in the CAF Team of the Year. Considering the fact that Salah is just 25-years-of-age, he is expected to achieve a lot more in the upcoming years.
He also leads the race for the European Golden Boot and will be looking forward to adding it to his trophy cabinet.