Suggestions by @squirtleproductions

Simon Pegg

as Policeman in Flushed away live action fancast

Score: +3

Tom Jones

as Rita's Grandmother in Flushed away live action fancast

Score: +2

Matthew Baynton

as Young Prince Charles in Flushed away live action fancast

Score: +4

King Charles III of the United Kingdom

as Young Prince Charles in Flushed away live action fancast

Score: +4

Richard Ayoade

as Captain Britain in Who should play Captain Britain in marvel

Score: 0