You could practically do an entire cabaret act on Jerry Herman borrowing from Jerry Herman.
However Jerry did rile Richard Rodgers when Mr. Rodgers heard the title song to Dear World ("Come take your medicine, dear world.") and heard similarities to Oh, What a Beautiful Morning. Go ahead, sing them.
Rodgers retaliated with the title song to Two By Two when he wrote "Two by two, bum BUM, the animals..." which was a direct quote from "Yes New York, bum BUM, its really us..."
Jerry Herman also borrowed liberally from a song called Sunflower or something like that when he wrote Hello Dolly. I have compared the sheet music. It is very, very similar. A lawsuit was filed and this infringement cost David Merrick dearly.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher