Suggestions by @kamil_drabik

Paul Rudd

as Commissar Ciaphas Cain in Warhammer 40K (Henry Cavil/Amazon)

Frances Fisher

as Granny Weatherwax in Discworld

Glenn Howerton

as Lucius the Eternal in Warhammer 40K (Henry Cavil/Amazon)

Emma Thompson

as Inquisitor Katarinya Greyfax in Warhammer 40K (Henry Cavil/Amazon)

Peter Capaldi

as Fabius Bile in Warhammer 40K (Henry Cavil/Amazon)

Idris Elba

as Vulkan in Warhammer 40K (Henry Cavil/Amazon)

Christopher Lloyd

as Inquisitor Fyodor Karamazov in Warhammer 40K (Henry Cavil/Amazon)

Crispin Glover

as Lorgar in Warhammer 40K (Henry Cavil/Amazon)

Mark Meechan

as Rob Anybody in Discworld

Ralph Fiennes

as Lord Downey in Discworld

Christian Bale

as Horus Lupercal in Warhammer 40K (Henry Cavil/Amazon)

David Tennant

as Magnus the Red in Warhammer 40K (Henry Cavil/Amazon)

DJ Qualls

as Nobby Nobbs in Discworld

Brad Pitt

as Lion El'Jonson in Warhammer 40K (Henry Cavil/Amazon)

Chris Hemsworth

as Leman Russ in Warhammer 40K (Henry Cavil/Amazon)

Cillian Murphy

as Konrad Curze in Warhammer 40K (Henry Cavil/Amazon)

Orlando Bloom

as Fulgrim in Warhammer 40K (Henry Cavil/Amazon)

Benedict Cumberbatch

as Magnus the Red in Warhammer 40K (Henry Cavil/Amazon)