Got to say, I generslly try to think the first two players thst come to mind. Not always the best, but generslly good, probably more iconic.
When I think of Brazil, it's 100% Fat Ronaldo. Absolute phenominan. And that's even over Rivaldo and Ronaldinho. Pure magic. He'd always be my pick over Garrincha.
Chile for me has to contain one of either Marcelo Salas or Ivan Zamorano, maybe even both?
Germany would contain Jurgen Klinsmann or Lother Matthaus over Kroos, easy.
England would contain either Gary Lineker or Alan Shearer instead of Keegan for me.
France would be Zinedine Zidane over Mbappe, easily.
Italy I'd swap Baggio for Dino Zoff or Buffon I think, as much as I love Baggio. The other two are just more iconic, especially for the position they play too.
A few I've not seen mentioned that spring to mind for me...
Belgium
Enzo Scifo and Kevin De Bruyne.
Czech Republic
Karel Poborsky and Paolo Nedved
Romania
Georghi Hagi and Gheorghe Popescu
Bulgaria
Hristo Stoichkov and Dimitar Berbatov
Denmark
Michael Laudrup and Peter Schmeichel
Sweden
Zlatan Ibrahimovic and Henrick Larsson
Switzerland
Xerdhan Shaqiri and Stephane Chapuisat
Cameroon
Roger Milla and Samuel Eto'o
Senegal
El-Hadji Diouf and Papa Bouba Diop
Ghana
Tony Yeboah and Sammy Kuffour