Here's a list of characters in the Riserverse who are worthy of receieving the power of Thor:

-Elsa

-Anna

-Jack Frost

-Spider-Man

-Rocket Racoon

-Gamora

-Drax

-Groot

-Star-Lord

-Hiro Hamada

-BAYMAX

-Gogo Tomago

-Honey Lemon

-Wasabi

-Fred Marlowe ("Fredzilla")

-Human Fluttershy

-Pony Fluttershy

-Human Sunset Shimmer

-Belldandy Morisato

-Keiichi Morisato

-Mabel Pines

-Princess Celestia

-Princess Luna

-Goku

-Gohan

-Dende

-Rom