Verstappen or Hamilton? Who is the GOAT according to former driver De la Rosa?

It is an eternal debate: Who is the best driver of all time? When asked, F1 purists quickly arrive at Ayrton Senna or Juan Manuel Fangio, while many who have followed motorsport since the mid-1990s mention the name of Michael Schumacher. Lewis Hamilton and now Max Verstappen are common choices these days. But who is it according to Pedro de la Rosa?