You sure about that?
His best league season for us was his first full season - 18 goals 11 assists. He's not got anywhere close to that since. His goal+assist output has been half of that in the subsequent 2 seasons and same ballpark in this one.
Son's best season is 23 goals 9 assists. And he hits impressive numbers in 4-5 other seasons.
Hazard's best season was 16 goals 15 assists. Other seasons include 16-5, 14-10, 14-9, 9-14.
Mane's best 18 goals 9 assists. But he also consistently hit good numbers.