Donnarumma will find it hard to escape the "golden prison" so I'm ignoring him but Raspadori and Pessina are obvious ones at smaller clubs, as is Scamacca. At bigger clubs you have Zaniolo as the standout, but much depends on his injuries. Rovella, Ricci and Fagioli look extremely promising and fortunately we own two of them. Lucca and Vignato are two to monitor up front.
I can pick U20 players with high potential but the point I'm making is that by the time these players are 21 and playing Serie A football their talent will show if it is there. With Juve we often wait until a player plays several seasons, is 22-24, and we pay the big money or have to compete with wealthy foreign clubs.