Suggestions by @hazelsmolbean

Julian Richings

as Charon in Riordanverse

Score: +1

Anthony Carrigan

as Charon in Riordanverse

Score: +1

Ariana Greenblatt

as Zoe Nightshade in Riordanverse

Score: +1

Breanna Yde

as Zoe Nightshade in Riordanverse

Score: +1

Lola Flanery

as Thalia Grace in Riordanverse

Score: +5

Vinodhini Vaidyanathan

as Poseidon in Percy Jackson & the Olympians

Score: -15

Dylan O'Brien

as Poseidon in Percy Jackson & the Olympians

Score: -10

Logan Lerman

as Poseidon in Riordanverse

Score: +2

Dylan O'Brien

as Poseidon in Riordanverse

Score: +2

Gal Gadot

as Athena in Riordanverse

Score: +3

Alexandra Daddario

as Athena in Riordanverse

Score: +5

Marisa Tomei

as Sally Jackson in Riordanverse

Score: +2

Lauren Graham

as Sally Jackson in Riordanverse

Score: +4

Jacob Tremblay

as Percy Jackson in Riordanverse

Score: -3

Dylan Kingwell

as Percy Jackson in Riordanverse

Score: +3

Layla Burns

as Juniper in Riordanverse

Score: +3

Noah Jupe

as Grover Underwood in Riordanverse

Score: +1

JD McCrary

as Grover Underwood in Riordanverse

Score: +1

Malina Weissman

as Silena Beauregard in Riordanverse

Score: +3

Caleb McLaughlin

as Charles Beckendorf in Percy Jackson & the Olympians

Score: -12