Suggestions by @mariopro64

Markipliar

as Markiplier in Garry's Mod The Movie

Score: +1

Garry Newman

as Garry in Garry's Mod The Movie

Score: +1

Seth MacFarlane

as Peter Griffin in Garry's Mod The Movie

Score: +1

Toby Fox

as Mr (ant) Tenna in Garry's Mod The Movie

Score: +1

Jackie Chan

as Jackie Chan in Garry's Mod The Movie

Score: +1

Keith David

as Sans Undertale in Garry's Mod The Movie

Score: +1

Joseph May

as Thomas the Dank engine in Garry's Mod The Movie

Score: +1

Hatsune Miku

as Hatsune Miku in Garry's Mod The Movie

Score: +1

Charlie Day

as Luigi in Garry's Mod The Movie

Score: +1

Jack Black

as Engineer in Garry's Mod The Movie

Score: +1

Chris Pratt

as Mario in Garry's Mod: The TV Series

Score: +2

Chris Pratt

as Mario in Garry's Mod The Movie

Score: +2