Famke Janssen
The best she has ever looked?
shareThis and Goldeneye imo
shareGoldenEye (1995) is the pinnacle.
Though it's largely due to the role and costumes.
Lord of Illusions (1995), The Faculty (1998), House on Haunted Hill (1999) are others alongside GE & DR where she looked amazing. The mid-to-late 90s was definitely her peak regarding looks.