All my favorite prospects are Americans, so I'd only be naming American players.
Of non-Americans, Jadon Sancho. I've watched him play a lot, so I feel like I could comment well on his game. I don't think he has eventual Ballon D'Or talent, but he's really good already and a smart footballer. I could see him being in the 5-15 range of world footballers for 10 years. I haven't seen that much of Sergio Gomez. I would've liked to see him play more, but I don't think he's the same level of talent as Sancho. I think he should be good enough to play for a big team, but more as a complimentary player.
Of non-Americans and non-Dortmund players, most of those high-profile English kids are really good. A year ago they played us in the QF's at the Sub17 World Cup and I thought we were the second best team in the tournament, but England destroyed us. It wasn't even close. They went on to win the final.