Suggestions by @jbroninja

Julia Butters

as Calypso in Percy Jackson and the Olympians + The Heroes of Olympus

Score: 0

Jake Picking

as Joe bob in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Florian Munteanu

as Antaeus in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Christian J. Simon

as Charles Beckendorf in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Piper Rubio

as Young Oracle of Delphi in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Alex Høgh Andersen

as Achilles in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Michelle Yeoh

as Melinoe in Percy Jackson and the Olympians + The Heroes of Olympus

Score: 0

Drew Starkey

as Achilles in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +2

Harris Dickinson

as Achilles in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Leo Howard

as Achilles in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Gemma Chan

as Mrs. Chase in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

James Marsden

as George in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Tony Hale

as George in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Jackson Robert Scott

as Lee Fletcher in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Finn Carr

as Lee Fletcher in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +2

August Maturo

as Lee Fletcher in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Kingston Foster

as Katie Gardner in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +2

Brady Hepner

as Apollo in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Nell Fisher

as Artemis in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1

Wesley Kimmel

as Matt Sloan in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +1