Suggestions by @m3ganh

Biggie Smalls

as B in The Alphabet

Score: +2

Owen Wilson

as A in The Alphabet

Score: +1

Guy Fieri

as Leon Kuwata in Danganronpa but Worse

Score: -1

Ted Nugent

as Leon Kuwata in Danganronpa but Worse

Score: +1

Rick Harrison

as Drax in Avengers But Worse

Score: +1

Gilbert Gottfried

as Monokuma in Danganronpa but Worse

Score: +1

Thomas Lennon

as Chuck Charles in Bob's Burgers

Score: +1

Avril Lavigne

as Patty Simcox in Punk Grease

Score: +1

Aron Erlichman

as Doody in Punk Grease

Score: +1

Jacoby Shaddix

as Putzie in Punk Grease

Score: +1

Taylor Momsen

as Marty Maraschino in Punk Grease

Score: +1

Nelly Furtado

as Cha-Cha DiGregorio in Punk Grease

Score: +1

Tyson Ritter

as Kenickie in Punk Grease

Score: +1

P!nk

as Jan in Punk Grease

Score: +1

Lzzy Hale

as Betty Rizzo in Punk Grease

Score: +2

Joel Madden

as Sonny LaTierri in Punk Grease

Score: +1

Gwen Stefani

as Frenchy in Punk Grease

Score: +2

Amy Lee

as Sandy Olsson in Punk Grease

Score: +1

Tyler Connolly

as Danny Zuko in Punk Grease

Score: +1

Kathryn Hahn

as Mary Hilgren-Bronson in King of the Hill

Score: +3