For 10 points—name this author of The Caretaker, The Dumbwaiter, and The Birthday Party.
The Hooded Man and the unnamed son of the Elderly Woman are in prison in one of this man's plays, while another play by this author ends with Deborah claiming that her parents are on a cruise to Bangkok with Estelle, though they are actually dead.  This author of Mountain Language and A Kind of Alaska created a play consisting entirely of a dialogue between a minicab Controller and a Driver, and one in which Rebecca calls Devlin a "fuckpig" after describing a man whom she told to put his hands around her throat.  In addition to Victoria Station and Ashes to Ashes, this author wrote a more famous work in which Aston receives shock treatments and Mac Davies attempts to conceal his Welsh heritage, one in which the hit-men Ben and Gus argue about lighting the kettle before Ben is told that his victim will enter with his fly open, and one about Goldberg and McCann meeting piano player Stanley Webber at the title event.  For 10 points—name this author of The Caretaker, The Dumbwaiter, and The Birthday Party.
The Hooded Man and the unnamed son of the Elderly Woman are in prison in one of this man's plays, while another play by this author ends with Deborah claiming that her parents are on a cruise to Bangkok with Estelle, though they are actually dead.  
Harold {Pinter} [accept {Mountain Language} before “{this man}”]