Phil LaMarr

IMDB Page

'Hermes Conrad' (voice) in Futurama 

'Ollie Williams' (voice) in Family Guy

'Bail Organa' (voice) in Star Wars: Rebels and Star Wars: The Clone Wars

'Paul Graves' in Veep

'Samurai Jack' (voice) in Samurai Jack

'Steve Duncan' in Grey's Anatomy

'Ryan Goldberg' in Lucifer

'Cassius' (voice) in Tales From the Borderlands

'Dr Holloway' in Castle

'Mouse' (voice) in Mass Effect 2 

'Captain Riiken' (voice) in Star Wars: Knights of The Old Republic 2

'Malcolm' / 'Skelter' (voices) in Vampire The Masquerade - Bloodlines

'Gadon Thek' / 'Warleader Garn' / 'Loremaster Gjarshi' (voices) in Star Wars: Knights of the Old Republic

'Marvin' in Pulp Fiction

'Captain Dredd' / 'Woody the Woodsman' (voices) in Monkey Island 2: LeChuck's Revenge

Alan Tudyk

IMDB Page

'Hoban 'Wash' Washburne' in Firefly and Serenity

'K2-S0' (voice) in Rogue One: A Star Wars Story

'Mr Priest' in Dirk Gently's Holistic Detective Agency

'Dangerboat' (voice) in The Tick

'Alistair Krei' (voice) in Big Hero 6

'Duke' (voice) in Frozen

'King Candy' (voice) in Wreck-It Ralph

'Alpha' in Dollhouse

'Tucker' in Tucker and Dale vs Evil

Mickey (voice) in Halo 3 ODST

Dale Maddox in V

Jack in Knocked Up

'Sonny' (voice) in I, Robot

'Wat in A Knights Tale

John Boyega

Although we didn't meet him, we did see John Boyega in the flesh when he came to the film an interview on the stage we were stood at during Star Wars Celebration 2016. So it counts!