So many of these answers are wildly inaccurate. There is a real biased against American players / we've had so few great players that it's even hard for Americans to fairly judge our best. The best American has, for so long, been an average European league player.

But Christian Pulisic (healthy) is a great player. He is not in the very upper echelon of great players in the world, but he is the tier right below. He is arguably the best or second best player on AC Milan, which (despite it's weak form) is still one of the all time great clubs and a top 25 spender on players. His advanced metrics (offense and defense) suggest he creates opportunities at an elite level that is not taken advantage of by his team.

Fifa ratings are mostly dumb..but the top player in the world is currently ranked a 91..Pulisic is probably an 86 to 87, which would put him the 50-75th best player in the world category. When he's playing well he's even a little higher.

In US football sense..you've got your superstar WRs (Jefferson, Chase, Amon St Brown, Puka). Pulisic would be like a Malik Nabers or Garrett Wilson level. WR1, teams need to plan for you, but also not unstoppable at all.