There’s only a finite amount of answers of course, so there should probably be a limit of one answer per post, so we can hopefully get a few pages out of this.

The Mosquitos

Broadway impresario Harold Hecuba.

Eva Grubb

Erica Tiffany Smith ( Zsa Zsa Gabor)

Dr. Boris Balinkoff

The Surfer guy

Wrong Way Feldman

The Surfer guy

Duke Williams

Tongo the Ape Man

Don’t know the character name without looking it up (which I consider cheating)……

The crook played by Don Rickles

Don’t know the character name without looking it up (which I consider cheating)……

The crook played by Don Rickles

Yeah, that's why I just put " The surfer guy" ;)

The Japenese sailor ( You steam glasses):D

Gilligan finds a jungle boy.

Lord Beasley

Soviet Astronauts

George Barkley, dishonest game show contestant claiming he was on deserted island

Several Headhunters from other islands

Jonathan Kincaid and his guide Ramoo