The first guy on the right is Hugo, played for several clubs, most notably Argentinos, Rapid Vienna, and Rayo Vallecano.
He never played a match for the Argentine national team. The second one needs no intro, Diego, the king of football.
The third is Raúl, played for Boca Juniors and Granada but also never got a game with the Argentine national team.
All three of them played during the same era, and they even teamed up at Granada in a friendly match against Malmö in 1987.