Doctor Who
Catherine Tate (Donna Noble)
John Barrowman (Jack Harkness)
Katy Manning (Jo Grant)
Colin Baker (6th Doctor)
Tom Baker (4th Doctor)
Paul McGanan (8th Doctor)
Nicholas Brigg (Lot's of things)
John Leeson (Voice of k-9)
(Spinoffs)
Kai Owen (Rhys Williams, Torchwood)
Eve Myles (Gwen Cooper Torcwhood)
Gareth David Lloyd (Ianto Torchwood)
Alexander Armstrong (Mr Smith)
Others
Sarah Michelle Gellar (Buffy (oh my god please!)
Stan Lee (The legend)
Anyone from Doctor Who (spin off's as well), Buffy The Vampire Slayer, Hunger Games, Big Bang Theory,
Ye, i know you can't get everyone but ye asked for what i'd want to see ^,^