Varane, Pogba, Sancho, Ronaldo, obviously; in the squad probably Van de Beek, Dalot, Shaw, Rashford, Martial, (our backup left back is Omar Richards signed on a free from Reading FC, you know, and our backup striker Eric-Maxim Choupo-Moting..).
But that's not even the point. The quality of players, or rather of their performances, is strongly linked to how the team is managed.
If a Liverpool fan had asked you that same question in 2016, it would have been implied that Henderson, Firmino, Milner, hell even Mané or Salah, wouldn't be able to break into your squad ahead of Di Maria, Herrera, Falcao, what have you.
You need a top manager. Then worry about players later.