Stan Lee

IMDB Page

Appeared in :

Agent Carter, Big Hero 6 (voice), Guardians of The Galaxy, Captain America: The Winter Soldier, Agents of Shield, The Simpsons (voice), the Thor series, Phineas and Ferb (voice), the Iron Man series , The Avengers, Chuck, A Town Called Eureka, Entourage, The Big Bang Theory, The Incredible Hulk and Hulk,, the Spider Man series, the Fantastic Four series,  Heroes, some of the X-Men series, Mallrats, and many, many more. 

Co created Spider man, The Hulk, the Fantastic Four, the X-Men, Iron Man, Thor, and many, many others. Helped make Marvel comics what it is today!

Robert Knepper

IMDB Page

'Samuel Sullivan' in Heroes

'Tommy Dolan' in Carnivale

'Theodore "T-Bag" Bagwell in Prison Break

'Detective Rex Coughlin' in Hawaii Five-0

'William Tockman / Clock King' in The Flash and Arrow

'Antonius' in The Hunger Games

'Sid Rothman' in Mob City

'The Courier' in The Blacklist

'Simeon' in Stargate Universe 

'Keith Reynolds' in E.R.

'Deputy Carlyle' in Young Guns 2

Summer Glau

IMDB Page

'River Tam' in Firefly & Serenity

'Isobel Rochev' in Arrow

'Greta' in Chuck

'Orwell' in The Cape

'Skylar Adams' in Alphas

'Maggie Hoaplii' in Hawaii Five-0

'Bennett Halverson' in Dollhouse

'Cameron Phillips' in Terminator : The Sarah Connor Chronicles

'Tess Doerner' in The 4400

'Prima Ballerina' in Angel

Edward James Olmos

IMDB Page

'Admiral / Commander William "Bill" Adama' in Battlestar Galactica

'Professor James Gellar' in Dexter

'Robert Gonzales' in Agents of S.H.I.E.L.D.

'Judge Roberto Mendoza' in The West Wing

'Lieutenant Martin Castillo' in Miami Vice

'Gaff' in Blade Runner

Jamie Bamber

IMDB Page

'Captain / Major Lee "Apollo" Adama in Battlestar Galactica

'Michael Hathaway' in Perception

'Dr Tyler Wilson' in Monday Mornings

'Kev Allinson' in The Smoke

'Martin Klaar' in Dollhouse

'2nd Lieutenant Jack Foley' in Band of Brothers

David Hewlett

IMDB Page

'Dr Rodney McKay' in Stargate SG-1,  Stargate Atlantis, and Stargate SGU

'Mr Schudy' in E.R.

'Larry Tolson' in Sanctuary

'Talbor Calchek' in Dark Matter