By Braden Chalker A handful of Major League Soccer players were among the best performers at the Copa America group stage for their respective countries. As the MLS season continues to roll on despite the ongoing Copa America and Euro competitions, most of the league’s best players aren’t available for their clubs as they’re with their national teams on the biggest stages. While two CONCACAF nations somehow didn’t reach the quarter-finals — we’re looking at you, USA and Mexico — Canada impressed with Jesse Marsch’s first tournament in charge while Argentina also weren’t too shabby with a cer…