Suggestions by @raghavsm1

Simon Pegg

as Peeves in Harry Potter(story private)

Score: +1

Emily Blunt

as Sybill Trelawney in Harry Potter(story private)

Score: +1

John Oliver

as Nearly Headless Nick in Harry Potter(story private)

Score: +1

Phoebe Tonkin

as Alecto Carrow in Harry Potter(story private)

Score: +1

Joe Cole

as Amycus Carrow in Harry Potter(story private)

Score: +1

J.K. Simmons

as Barty Crouch Sr. in Harry Potter(story private)

Score: +1

Charlie Heaton

as Barty Crouch Jr. in Harry Potter(story private)

Score: +1

Paul Dano

as Peter Pettigrew in Harry Potter(story private)

Score: +1

Peter Capaldi

as Rufus Scrimgeour in Harry Potter(story private)

Score: +1

Malonn Lévana

as Lavender Brown in Harry Potter(story private)

Score: +1

Bleu Landau

as Dennis Creevey in Harry Potter(story private)

Score: +1

Peyton Wich

as Gregory Goyle in Harry Potter(story private)

Score: +1

Jeremy Ray Taylor

as Vincent Crabbe in Harry Potter(story private)

Score: +1

Chosen Jacobs

as Dean Thomas in Harry Potter(story private)

Score: +1

Shaun Evans

as Dobby in Harry Potter(story private)

Score: +1

Peter Serafinowicz

as Alastor Moody in Harry Potter(story private)

Score: +1

David Koechner

as Mundungus Fletcher in Harry Potter(story private)

Score: +1

Precious Mustapha

as Angelina Johnson in Harry Potter(story private)

Score: +1

Liza Soberano

as Katie Bell in Harry Potter(story private)

Score: +1

Bryan Williams

as Cormac McLaggen in Harry Potter(story private)

Score: +1