Does the Pied Piper of Hamelin count?

There was of course Uncle Rat who presided over the unfortunate nuptials of the frog and the mouse.

And in the song 'Happy Family/Father had a Knife'

"Father had a rat, mother had a mouse,
Sister had a flea, and brother had a louse.

And who can forget Gordon Hall singing with relish about the size of rats in the quartermaster's stores?

But above them all stands Lord Roderick:-

Of all the peers of London Town
Who saunter up Pall Mall and down
There's none who've earned such high renown,
As Lord Roderick.

See him stroll in neat white spats
Disdaining all the common cats
To take his seat in the House of Rats,
And legislate.

How nobly he proclaims the laws
To protect wealth from grasping claws
And selflessly he serves the cause
Of aristocrats.

For centuries of plundered wealth
Are vital to the national health
Especially to the noble self
Of Lord Roderick.

PS This may be based on a complete misconception of the meaning of "Rathaus".