Suggestions by @lordtargaryen

Harry Lloyd

as Loki in Mythos

Alexander Ludwig

as Thor in Mythos

Rufus Sewell

as Hephaestus in Mythos

Matthew Noszka

as Hercules in Mythos

Jessica Chastain

as Hestia in Mythos

Matt Bomer

as Poseidon in Mythos

Charles Melton

as Eros in Mythos

Sam Claflin

as Apollo in Mythos

Keira Knightley

as Athena in Mythos

Phoebe Tonkin

as Artemis in Mythos

Dane DeHaan

as Peter Pettigrew in The Marauders Era

William Moseley

as Lucius Malfoy in The Marauders Era

Jessica Brown Findlay

as Amelia Bones in The Marauders Era

Tom Hughes

as Lord Voldemort in The Marauders Era

Louis Garrel

as Severus Snape in The Marauders Era

Bradley James

as Ted Tonks in The Marauders Era

Domhnall Gleeson

as Arthur Weasley in The Marauders Era

Rose Leslie

as Molly Prewett in The Marauders Era

Holland Roden

as Lily Evans in The Marauders Era

Joseph Gordon-Levitt

as Frank Longbottom in The Marauders Era