Suggestions by @cdawg8281211

Jason Momoa

as Breakdown in Transformers reboot: Dawn of Megatron

Johnny Depp

as Knockout in Transformers reboot: Dawn of Megatron

James Marsden

as Sideswipe in Transformers reboot: Dawn of Megatron

Zach Galifianakis

as Sunstreaker in Transformers reboot: Dawn of Megatron

David Tennant

as Thundercracker in Transformers reboot: Dawn of Megatron

Liam Neeson

as Optimus/Nemesis Prime in Transformers

Mark Hamill

as Starscreem in Transformers Live Action Reboot Franchise

Sam Elliott

as Ironhide in Transformers reboot: Dawn of Megatron

Mark Ruffalo

as Ratchet in Transformers reboot: Dawn of Megatron

J.K. Simmons

as Ratchet in Transformers reboot: Dawn of Megatron

Peter Weller

as Prowl in Transformers reboot: Dawn of Megatron

Will Smith

as Jazz in Transformers reboot: Dawn of Megatron

Josh Brolin

as Megatron in Transformers reboot: Dawn of Megatron

Amy Adams

as Arcee in Transformers reboot: Dawn of Megatron

Nicholas Briggs

as Soundwave in Transformers reboot: Dawn of Megatron

Mark Hamill

as Starscream in Transformers reboot: Dawn of Megatron

Benedict Cumberbatch

as Shockwave in Transformers reboot: Dawn of Megatron

Shia LaBeouf

as An older Sam witwicky in Transformers reboot: Dawn of Megatron

Joe Keery

as Travis Gardener in Transformers reboot: Dawn of Megatron

Liam Neeson

as Optimus prime in Transformers reboot: Dawn of Megatron