Alejandro Valdes Tobier is listed at 65kg for Cuba - he'll be the toughest guy in the bracket for Nick Lee to get past IMO.
Valdes is a two-time world bronze medalist (2017 and 2018) and had a really close match with Yianni at Pan-Ams last year
https://www.flowrestling.org/video/10957823-65-kg-gold-yianni-diakomihalis-usa-vs-alejandro-valdes-cub
He also has notable freestyle wins over Khinchegeshvili, Bekbulatov, Haji Aliyev, Franklin Gomez, and even Coleman Scott.
Valdes is listed at 35 years old though so definitely past his prime but still super crafty. That said, if Nick Lee gets rolling early, I wouldn't be surprised if he wins handily.