There's only two that really impress me: Daniel Dubois and Felip Hrgovic.
Is there anyone else? Perhaps Bakhodir Jalolov or Frank Sanchez?
Mahammadrasul Majidov who KOed Joshua in amateurs is good but he turned pro too late. Same with Romanov, who KOed Wilder in the amateurs.
Petar Milas was doing well with two wins over former world title challengers in 2018, but has no meaningful fights since.