Rick Foucheux, Tim Getman, Nancy Robinette, and Jeremy S. Holm are all smiles in Arena’s Death of a Salesman. Photos by Scott Suchman/courtesy Arena Stage. Willy Loman is a tired, pitiable, senile man, older than his 60 years. But in the canon of 20th century American drama, he’s the Alpha dog, the big man, the Steve McQueen. He’s become an iconic figure, like Icarus or Hamlet, and lots of people who have never seen…