Mr Diagonal is frontman for the Black Light Orchestra. According to their blurb:
Combining Belgian surrealism, English pop and classical orchestration, their deranged, wide-ranging theatre music incorporates elements of Brecht and Weil, Noël Coward, Van Dyke Parks, Monty Python, Frank Zappa,
Tom Waites, Douglas Adams and the Residents.
These two videos are the only ones I’ve seen, but they’re definitely my cup of tea. The first video explains Scottish prehistory, and the second relives the angst of school prize-givings.