Suggestions by @austindickey

Matthew Lillard

as Shaggy Rogers in Scooby Doo! Pirates Ahoy

Score: +1

Neil Fanning

as Scooby Doo in Scooby Doo! Pirates Ahoy

Score: +1

Linda Cardellini

as Velma Dinkley in Scooby Doo! Pirates Ahoy

Score: +1

Sarah Michelle Gellar

as Daphne Blake in Scooby Doo! Pirates Ahoy

Score: +1

Freddie Prinze Jr.

as Fred Jones in Scooby Doo! Pirates Ahoy

Score: +1

Tony Curran

as McIntyre in Scooby Doo and the Lochness Monster

Score: +1

Norm Macdonald

as Jared Moon in Aloha Scooby Doo

Score: +1

Judd Nelson

as Ruben Laluna in Aloha Scooby Doo

Score: +1

Teryl Rothery

as Mayor Molly Quinn in Aloha Scooby Doo

Score: +1

Amy Hill

as Auntie Mahina in Aloha Scooby Doo

Score: +1

Taylor Wily

as Little Jim in Aloha Scooby Doo

Score: +1

Maggie Q

as Snookie Waeawa in Aloha Scooby Doo

Score: +1

Pua Magasiva

as Manu Tuiama in Aloha Scooby Doo

Score: +1

Neil Fanning

as Scooby Doo in Aloha Scooby Doo

Score: +1

Matthew Lillard

as Shaggy Rogers in Aloha Scooby Doo

Score: +1

Linda Cardellini

as Velma Dinkley in Aloha Scooby Doo

Score: +1

Sarah Michelle Gellar

as Daphne Blake in Aloha Scooby Doo

Score: +1

Freddie Prinze Jr.

as Fred Jones in Aloha Scooby Doo

Score: +1

David Tennant

as Duncan MacGubbin in Scooby Doo and the Lochness Monster

Score: +1

Sean Astin

as Dell Chillman in Scooby Doo and the Lochness Monster

Score: +1