Suggestions by @jbroninja

Izaac Wang

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

Score: +1

Elodie Grace Orkin

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

Score: +1

Jason David

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

Score: +2

Luna Steeples

as Rachel Elizabeth Dare in Percy Jackson and the Olympians + The Heroes of Olympus

Score: +4

Wyatt McClure

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

Score: +1

Jason Lee

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

Score: +2

Will Forte

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

Score: +1

Breckin Meyer

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

Score: +2

Seth Green

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

Score: +1

David Faustino

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

Score: +1

David Iacono

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

Score: +1

Ruby Rose Turner

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

Score: +1

Casey Simpson

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

Score: 0

Quvenzhané Wallis

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

Score: +1

Shahadi Wright Joseph

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

Score: +2

Mackenzie Meehan

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

Score: +1

Kathryn Hahn

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

Score: +1

Eddie Redmayne

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

Score: +1

Michael Shannon

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

Score: +1

Neil Patrick Harris

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

Score: +1