I’m a theater nerd, friend is not

Looking for something that we’ll both really like. For background, I love the theater, I see 2 shows a month here in NYC. I’ll be going to London for the first time June 19-21 with a German friend who is new to theater and here are our constraints:

• both have a preference for plays over musicals, I know I can be moved by a good musical but he’s more skeptical
• He’s mostly fluent in English but finds certain regional British accents difficult to understand
• both enjoy a range of drama, dark humor, silly humor, thought-provoking pieces

My thoughts, would love yours:

• Witness for the Prosecution (unique setting, gripping drama, would some accents be tough for him though?)
• The Producers (I’ve only see the movie, although it’s a musical he’ll probably get a big kick out of the humor and the German elements)
• Oh Mary (I’ve seen in NY already but it’s quick and I’d happily see Catherine Tate)
• Cyrano (this one excited me as a theater lover, but it’s a long run time if it will be hard for a first-timer to appreciate)

West End Shows I’ve seen already in NY:

• The Play that Goes Wrong (❤️), Book of Mormon (👍), Wicked (❤️), Titanique (👎) , Hadestown (👍)