in no particular order: Tyrion Lannister Avon Edmund Blackadder Arnold Judas Rimmer The Doctor (#4 is my favourite portrayal) Jane Tennison Gene Hunt Sheldon Cooper Albert Steptoe Alf Garnett
A few I'm not sure have been said yet: Nathan Barley Dr Sanchez Dean Learner Murray from flight of conchords Roger from American dad Matt le blanc as himself in episodes
I piss myself when he hands the scotch mist porridge and shortbread and goes "sorry, I don't have any salt to go with that"
Plus he's the most likeable guy despite being a **** to everyone. He should be getting grammys for his work in that.