Suggestions by @zacharyoxford

Matt Berry

as The Meddling Monk in How The Monk Got His Habit (2015)

Gregor Fisher

as Peter Butterworth Meddling Monk in How The Monk Got His Habit (2015)

Gregor Fisher

as First Monk in The Meddler Doctor Who Beyond

Alan Rickman

as Rasputin Monk (1990-1994 in The Meddler Doctor Who Beyond

Gillian Anderson

as Seventh Rani (2008-12 in The Rani Doctor Who Beyond

Clare Higgins

as Sixth Rani (2005-07 in The Rani Doctor Who Beyond

Lindsay Duncan

as Fifth Rani (2004) in The Rani Doctor Who Beyond

Adrianne Palicki

as Fourth Rani (2000-03 in The Rani Doctor Who Beyond

Julianne Moore

as Third Rani (1996-1999 in The Rani Doctor Who Beyond

Siobhan Redmond

as Second Rani (1992-95 in The Rani Doctor Who Beyond

Kate O'Mara

as First Rani (1985-1991 in The Rani Doctor Who Beyond

Finn Cole

as Twelfth Master (2022- in The Master Doctor Who Beyond

Alex Kingston

as Eleventh Master (2017-21 in The Master Doctor Who Beyond

Charles Dance

as Ninth Master (2011-14 in The Master Doctor Who Beyond

Con O'Neill

as Tenth Master (2015-16 in The Master Doctor Who Beyond

David Harewood

as Eighth Master (2008-10 in The Master Doctor Who Beyond

Tim McInnerny

as Seventh Master (2003-07 in The Master Doctor Who Beyond

Ian McShane

as Sixth Master (2001-02 in The Master Doctor Who Beyond

Geoffrey Beevers

as Fifth Master (2000) in The Master Doctor Who Beyond

Jonathan Pryce

as Fourth Master (1997-99 in The Master Doctor Who Beyond