When I was nine years old, my aunt gave me a book that contained the librettos of three Gilbert and Sullivan operas and a collection of the shorter pieces that Gilbert wrote, using his pen name, Bab. (Iolanthe was not in that book so I had to wait a few years to read the "Nightmare Song" that Frank, so appropriately, cites). I agree that, for wordbending rhymes and satire, WSG stands alone.
But alanabit's moninee, Tom Lehrer, was no slouch in that department.
I used to think that the great songwriters were gone until I heard Shelly Posen's CD, "Manna".