Suggestions by @adrianpintado

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as Karl Urban in What if this actor played

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Treebeard

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Dutch van der Linde

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John Twiggs Myers

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Andrew Jackson

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as Danny Huston in What if this actor played

Arnold Toht

as Peter Lorre in What if this actor played

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Mr. Miyagi

as Cary-Hiroyuki Tagawa in What if this actor played

Fabrizio di Rossi

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Abraham Reyes (Red Dead)

as Oscar Isaac in What if this actor played

Mr. Bean

as Jim Parsons in What if this actor played

Anakin Skywalker

as Anton Yelchin in What if this actor played