Notes:

My edit based on the Edge-O-Meter which was probably made by Tumblr user princessrosalina. The image of Mabel (source vector) is from "The Hand That Rocks the Mabel", Dipper (source vector) is from "The Inconveniencing", Robbie is a promotional illustration, Grunkle Stan is from "Scary-oke", Bill Cipher is from "Dreamscaperers", and this picture of Wendy was made by deviantART user markmak.