Suggestions by @peterjones1

Michael Bell

as Yally Yalapappus in Little Monster at School (TV Animated Version)

Score: +2

Melanie Chartoff

as Little Yaff in Little Monster at School (TV Animated Version)

Score: +2

Mark Camacho

as Dad in Little Monster at School (TV Animated Version)

Score: +2

Yeardley Smith

as Baby in Little Monster at School (TV Animated Version)

Score: +3

Jeanne Tripplehorn

as Zipperump-A-Zoo in Little Monster at School (TV Animated Version)

Score: +2

Rowan Atkinson

as Grendella in Little Monster at School (TV Animated Version)

Score: +3

Pam Ferris

as Principal in Little Monster at School (TV Animated Version)

Score: +2

Nancy Cartwright

as Mum in Little Monster at School (TV Animated Version)

Score: +2

Diana Rice

as Little Monster in Little Monster at School (TV Animated Version)

Score: +2

Susie McKenna

as Mrs Grithix in Little Monster at School (TV Animated Version)

Score: +2

Martin Clunes

as Mr Grithix in Little Monster at School (TV Animated Version)

Score: +2

Frank Oz

as Mikey in The Mikey the Robot Show (1990)

Score: +1

Gaby Hoffmann

as Melissa in The Mikey the Robot Show (1990)

Score: +1

George 'Gabby' Hayes

as Melissa in The Mikey the Robot Show (1990)

Score: +1

Richard Briers

as Richard in Watch And Learn (2000)

Score: +3

Tracy Shaw

as Tracy in Watch And Learn (2000)

Score: +2

Helena Smee

as Lizzie the Duck in Katie's Night Time Adventure (2021)

Score: +2

Arthur Darvill

as Humphrey the Parrot in Katie's Night Time Adventure (2021)

Score: +3

Nigel Plaskitt

as Geoffrey the Rat in Katie's Night Time Adventure (2021)

Score: +2

Katherine Kelly

as Didi in Katie's Night Time Adventure (2021)

Score: +2