19 suggestions
Morgan Freeman
as Mr Goo Voice in Goo

Verbal Ase
as Jim Jam in Goo

Ryan Reynolds
as Jim Jam in Goo

Sean "JackSepticeye" McLoughlin
as Jim Jam in Goo

Samuel L. Jackson
as Jim Jam in Goo

Seth MacFarlane
as Mason in Siren Head
PewDiePie
as Choreographer in Siren Head

Britney Spears
as Scp 096 in Scp 682

Jason Momoa
as D Class 3 in Scp 682

Katy Perry
as D Class 3 in Scp 682

Óscar Gutiérrez Rubio
as D Class 3 in Scp 682
Sam Spruell
as D Class 2 in Scp 682

danTDM
as D Class 2 in Scp 682

Ian Bohen
as D Class in Scp 682
Robert Downey Jr.
as 682 Voice in Scp 682
Josh Radnor
as 682 Voice in Scp 682
PewDiePie
as Scp 079 Voice Actor in Scp 682

Megan Fox
as Nine Tail Fox in Scp 682

Johnny Depp
as Dr Cleff in Scp 682