Comedian and actor John Leguizamo's "The Other Americans," his first full-length and full-cast play, aside from his satiric one-person shows, is making its Off Broadway debut and proves to be an impressive dysfunctional family drama. Following in the tradition of Arthur Miller's "All My Sons" and "Death of a Salesman," Lorraine Hansberry's "A Raisin in the Sun" and August Wilson's "Fences," as well as Eugene O'Neill'…