They should've definitely used king Arthur or a medieval knight as

King Arthur and His Knights of the Round Table by Roger Lancelyn Green

Endings (King Arthur and Her Knights): Shea, K. M.: 9780692979914: : Books

The timeless allure of King Arthur's Gawain: 'He feels like the first modern protagonist', Poetry

What kind of armor did the knights of King Arthur's court wear? - Quora

King Arthur : Clive Owen, Stephen Dillane, Keira Knightley, Ioan Gruffudd, Mads Mikkelsen, Joel Edgerton, Hugh Dancy, Ray Winstone, Ray Stevenson, Stellan Skarsgård, Til Schweiger, Sean Gilder, Antoine Fuqua, Bruce Moriarty

Used Legends In Steel Long Sword of Excalibur King Arthur Knight Medieval Chrome

Could Brock Lesnar defeat a knight in the medieval joust? He is given an ATV, a shield, and a 2x4 piece of wood. : r/Wrasslin

Did King Arthur wear metal armor? - Quora

Excalibur (Warlord Chronicles Series #3) by Bernard Cornwell, Paperback

Bruckheimer Make Boom with the “Real” King Arthur (2004)

2nd day of Arhur release and all i can think now is who wore it better Looking at the comments, Arthur is a poor mans Tyr : r/Smite

Clive Owen and Keira Knightley Costumes From Disney's King Arthur Movie Surface Online - Inside the Magic