4. Valentin Zukosky
First introduced in GoldenEye, Valentin Zukosky (played by Robbie Coltrane), was a former KGB agent who Bond had shot in the leg years earlier, giving Zukosky a limp. Zukosky had connections with the Russian mafia and helped set up Bond with Janus, the man behind the theft of GoldenEye. Janus, of course, turned out to be Alec Trevelyan, a former 00 agent. It'd be fun to see how Bond and Zukosky met as well as what led to Bond shooting him in the leg, which, as Bond tells him GoldenEye, he only did to miss the rest of him.