An Ideal Husband - Oscar Wilde 

Like Wilde's other "serious" comedies, "An Ideal Husband" revolves around one central character with a guilty 
past and another who is forced to reassess her absolute black-and-white moral standards and recognize 
that "Nobody is incapable of doing a foolish thing. Nobody is incapable of doing a wrong thing. . . 
Life cannot be understood without much charity, life cannot be lived without much charity". 
Plus, of course, plenty of Wildeian wit. 

Cast of 15 - though some doubling possible. Ostensibly 9M, 6F but four of the small male roles are servants 
and could possibly be cast as female, especially if, as I would be likely to do, the setting of the play is updated. 
Four Acts (with interval between Acts 2 & 3), requiring three different sets, but staging can be stylized rather 
than naturalistic. Out of copyright, so no rights to pay. 

Main characters: 

Lord Robert Chiltern - 40 - successful politician who seems set for even higher things; 
but all could be brought crashing down if it becomes known that he owes his early success to having passed 
confidential Government information to a corrupt financier. 

Lady Gertrude Chiltern - late 20s - Lord Chiltern's wife - idolizes her husband as a model of virtuous behaviour: 
it seems unlikely that her love would survive the revelation of any moral failing on his part. 

Mrs Cheveley - late 20s - thoroughly unscrupulous; a society thief and blackmailer - possesses the evidence of 
Lord Chiltern's past misdemeanour, and intends to use it to her advantage. 

Lord Goring - mid-30's - superficially, well, superficial; a dandy and wit in the "aesthetic" mode, but with 
more good sense than his pose suggests. 

Lord Caversham - 70ish - Lord Goring's father - comic but kindly old duffer, constantly exasperated at his son. 

Mabel Chiltern - 20s - Lord Robert's sister. A bright young thing, Lord Goring's sparring partner and love interest. 

Lady Markby - middle-aged. A prototype Aunt Augusta. Only in Act 1, but a nice comic turn. 

The other parts are small roles as party guests and servants, but most of them get some nice comic lines.