Suggestions by @nathanialprice

Charles Dance

as Barty Crouch Sr in Harry Potter and the goblet of fire

Charles Dance

as Barty Crouch Sr. in The First Wizarding War

Richard Madden

as Dmitri Karamazov in The Brothers Karamazov

Charlie Heaton

as Barty Crouch Jr in The Marauders Era

Thomas Brodie-Sangster

as Evan Rosier in The Marauders Era

Dev Patel

as James Potter in The Marauders Era

Dean-Charles Chapman

as Peter Pettigrew in The Marauders Era

Keeley Hawes

as Minerva McGonagall in The Marauders Era

Kaya Scodelario

as Andromeda Tonks in The Marauders Era

Bill Skarsgård

as Lord Voldemort in The Marauders Era

Fionn Whitehead

as Severus Snape in The Marauders Era

Ellie Bamber

as Narcissa Malfoy in The Marauders Era

Sophie Rundle

as Marlenne Mckinnon in The Marauders Era

George MacKay

as Remus Lupin in The Marauders Era

Sophie Rundle

as Marlene McKinnon in James Potter and the Marauders’ Map

Kaya Scodelario

as Andromeda Black in James Potter and the Marauders’ Map

Ellie Bamber

as Narcissa Black in James Potter and the Marauders’ Map

Harry Lloyd

as Lucius Malfoy in James Potter and the Marauders’ Map

Bill Skarsgård

as Voldemort in James Potter and the Marauders’ Map

Fionn Whitehead

as Severus Snape in James Potter and the Marauders’ Map