Suggestions by @acexavier

Eric Lopez

as Silver Scarab in Earth-27 fancast (rewrite)

Score: +1

Xolo Maridueña

as Silver Scarab in Earth-27 fancast (rewrite)

Score: +1

Irene Bedard

as Rainmaker in Earth-27 fancast (rewrite)

Score: +2

Travis Willingham

as Burnout in Earth-27 fancast (rewrite)

Score: +1

Ryan Potter

as Bushido in Earth-27 fancast (rewrite)

Score: +1

E.G. Daily

as Freefall in Earth-27 fancast (rewrite)

Score: +1

Flea

as Grunge in Earth-27 fancast (rewrite)

Score: +1

Alicia Witt

as Hardbody in Earth-27 fancast (rewrite)

Score: +1

Lake Bell

as Freefall in Earth-27 fancast (rewrite)

Score: +1

Troy Baker

as Grunge in Earth-27 fancast (rewrite)

Score: +1

Laura Bailey

as Hardbody in Earth-27 fancast (rewrite)

Score: +1

Hayden Panettiere

as Solstice in Earth-27 fancast (rewrite)

Score: +1

Justin Briner

as Bushido in Earth-27 fancast (rewrite)

Score: +1

Ashley Burch

as Bombshell in Earth-27 fancast (rewrite)

Score: +1

Bruce Campbell

as Grunkle Stan in Gravity Falls

Score: +1

Bruce Campbell

as Stanley Pines in Gravity Falls Live Action

Score: 0

Keiynan Lonsdale

as Kid Mercury in Earth-27 fancast (rewrite)

Score: +1

Michaela Jill Murphy

as Atlee in Earth-27 fancast (rewrite)

Score: +1

Harvey Guillén

as Soos Ramirez in Gravity Falls Live Action

Score: 0

Robert Downey Jr.

as Stanley Pines in Gravity Falls Live Action

Score: +2