Suggestions by @alexcrawford

Ralph Fiennes

as Megatron in Transformers: 'Til All Are One

Bryan Cranston

as Optimus Prime in Transformers: 'Til All Are One

Prowl (Transformers)

as Rino Romano in Voice Actors & Actresses For Characters To Be Voiced

Bumblebee (G1)

as Jason Marsden in What characters would you like to hear voice actors voice?

Bluestreak (Transformers)

as Will Friedle in Voice Actors & Actresses For Characters To Be Voiced

Blaster (Transformers)

as Wayne Brady in Voice Actors & Actresses For Characters To Be Voiced

Hook (Transformers)

as Phil LaMarr in Voice Actors & Actresses For Characters To Be Voiced

Lockdown (Transformers)

as Robert Englund in Voice Actors & Actresses For Characters To Be Voiced

Doctor Arkeville (Transformers)

as Tim Curry in Voice Actors & Actresses For Characters To Be Voiced

Mirage (Transformers)

as Greg Cipes in Voice Actors & Actresses For Characters To Be Voiced

Slug (Transformers)

as Travis Willingham in Voice Actors & Actresses For Characters To Be Voiced

Blitzwing (Transformers)

as Trey Parker in Voice Actors & Actresses For Characters To Be Voiced

Bulkhead

as Isaac C. Singleton Jr. in Voice Actors & Actresses For Characters To Be Voiced

Ironhide (Transformers)

as Patrick Warburton in Voice Actors & Actresses For Characters To Be Voiced

Bluestreak (Transformers)

as Carlos Alazraqui in Voice Actors & Actresses For Characters To Be Voiced

Starscream

as Tom Kenny in Voice Actors & Actresses For Characters To Be Voiced

Megatron

as Fred Tatasciore in Voice Actors & Actresses For Characters To Be Voiced

Ratchet

as Jim Cummings in Voice Actors & Actresses For Characters To Be Voiced

Starscream

as Hank Azaria in Voice Actors & Actresses For Characters To Be Voiced

Slipstream (Transformers)

as Jennifer Hale in Voice Actors & Actresses For Characters To Be Voiced