Suggestions by @visno

ThunderCats

as 80's Cartoons in Mount Rushmores

The World of David the Gnome

as 80's Cartoons in Mount Rushmores

Jem and the Holograms

as 80's Cartoons in Mount Rushmores

Voltron (1984 TV series)

as 80's Cartoons in Mount Rushmores

Rainbow Brite (1984 TV series)

as 80's Cartoons in Mount Rushmores

Freddie Wong

as YouTubers in Mount Rushmores

Philip Wang

as YouTubers in Mount Rushmores

Joss Fong

as YouTubers in Mount Rushmores

Johnny Harris

as YouTubers in Mount Rushmores

Simon Whistler

as YouTubers in Mount Rushmores

Doraemon

as Anime in Mount Rushmores

D (Vampire Hunter D)

as Anime in Mount Rushmores

Vash the Stampede

as Anime in Mount Rushmores

Inuyasha

as Anime in Mount Rushmores

Belldandy (Oh My Goddess!)

as Anime in Mount Rushmores

Spike Spiegel

as Anime in Mount Rushmores

Sebastian the Crab (The Little Mermaid)

as Disney Comic-Reliefs in Mount Rushmores

Phoenix (Jean Grey)

as Marvel Superheroes in Mount Rushmores

Charles Xavier

as Marvel Superheroes in Mount Rushmores

Charles F. Muntz

as Disney Villains in Mount Rushmores