It's always hard to pick the "best" out of any group. I also think it would be hard on a coach to field a team out of this group, and much would have to do with formation and tactics. Here's my opinion, and no doubt, there are many different opinions. Also, I'm probably going to miss some, may be wrong on class year, and butcher some names.
GK's
Mozzo-Beaufort
Owens-West Ashley
Defenders
Barbieri-Fort Mill
Rushton-Greenville (although I think plays outside mid in HS)
Mattern-JL Mann
Valikonis-Eastside (also a midfielder)
Reed-Pinewood
Symmes-Eastside?
Riley-South Aiken (think plays up top for HS)
Mid Field
Lundy-Wando
Benson-NW (playing defense in HS)
Sweet-Pinewood (playing defense in HS)
Valencia-Mauldin
Sluga-Riverside
Khoury-BE
Forwards
Valasquez-Greenville
Martinez-NW
Meyers-Lincoln
Savage-Stratford
Watson-Soccastee
In a 4-3-3,
Forwards, Valasquez, Martinez, Meyers
Mids, Lundy, Benson, Sweet
Defense, Rushton, Barbieri, Mattern, Riley/Valikonis
In a 4-4-2
Forwards, Valasquez, Martinez
Mids, Lundy, Benson, Sweet, Watson/Khoury
Defense, Rushton, Barbieri, Mattern, Riley/Valikonis
In a 3-5-2
Forwards, Valasquez, Martinez
Mids, Lundy, Benson, Sweet, Watson, Khoury
Defense, Rushton, Barbieri, Mattern/Riley/Valikonis