I'd have to say Scott Bakula playing Dr Sam Beckett in the television series
Quantum Leap. Does anyone else remember that show?
Oh, and another "special character" would be Calista Flockhart as Ally McBeal in the eponymous television series. The character she is currently playing in
Brothers and Sisters, Kitty Walker McCallister, is a conservative Republican and quite different from Ally. Yet it's taken me quite a while to stop thinking "Ally" whenever I see her on screen; she was so memorable in that role.
