This film most emphatically does not need a remake. It's fine the way it is.
You've seen Guy Standeven in something because the man was in everything.

My cast list would be:
Ryan Reynolds as Elias
Vince Vaughn as Barnes
Josh Hutcherson as Chris Taylor
Jason Lee as O'Neill
Luke Evans as Bunny
William Baldwin as Wolfe
Terry Crews as Big Harold
Will Smith as Warren
Michael B. Jordan as Junior
Kellan Lutz as Doc
Noah Munck as Lerner
Kid on bike "Where you going?"
Charlie Bright "Somewhere".

Probably somebody like Toby Maguire. He invariably comes across as the kind of green and clueless cheese dick you'd expect. Then at the end he could dip into his role in Brothers.
Hey! You're not old enough to drink! Now go and die for your country!!!

Platoon is a masterpiece, it will never be remade.
Shall we play a game?