Suggestions by @gavinj1899

Daniel Dae Kim

as Sesa 'Refumee in Halo (TV Adaptation)

Score: +1

Andy Serkis

as The Prophet of Stewardship in Halo (TV Adaptation)

Score: +1

Michael Mando

as Corporal Seth O'Donnell in Halo (TV Adaptation)

Score: +1

Nathan Fillion

as Sergeant Edward Buck in Halo (TV Adaptation)

Score: +1

Jack Quaid

as Private Wallace Jenkins in Halo (TV Adaptation)

Score: +1

Lashana Lynch

as Foehammer in Halo (TV Adaptation)

Score: +1

Khary Payton

as Rtas Vadam in Halo (TV Adaptation)

Score: +1

Idris Elba

as Thel Vadamee in Halo (TV Adaptation)

Score: +1

Katy O'Brian

as First Lieutenant Melissa McKay in Halo (TV Adaptation)

Score: +1

Giancarlo Esposito

as Major Antonio Silva in Halo (TV Adaptation)

Score: +1

Jamie Foxx

as Sergeant Major Avery Johnson in Halo (TV Adaptation)

Score: +1

Josh Brolin

as Captain Jacob Keyes in Halo (TV Adaptation)

Score: +1

Jen Taylor

as Cortana in Halo (TV Adaptation)

Score: +1

Steve Downes

as Master Chief in Halo (TV Adaptation)

Score: +2

Winston Duke

as Master Chief in Halo (TV Adaptation)

Score: 0

Steven Spielberg

as Producer in Halo (TV Adaptation)

Score: +1

Joe Staten

as Writer in Halo (TV Adaptation)

Score: +1

Craig Mazin

as Writer in Halo (TV Adaptation)

Score: +1

Marty O' Donnel

as Composer in Halo (TV Adaptation)

Score: +1

Craig Mazin

as Director in Halo (TV Adaptation)

Score: +1