Consciously uncoupling the Koskov/Whitaker relationship; this time Koskov can slugtrail about on his own, the oily little gibbon. It does seem to be largely his plan, whatever the plan is, and has more of a relationship, however flirtatious, with Bond. Whitaker relegated, like Orlov, to Other Villainy yet to come. He met his Mont-Saint-Jean.
Silva telling everybody the rat story is such a deliciously captivating way to go.
LeChiffre only has that carpet beater so Dr. No will win easily by shaking hands with his radioactive flippers (it will take time, for sure, but so does the carpet beater).
Koskov just slimes anybody and will then take the next plane into a mountain.
Admittedly, Koskov is better paired with Brad Whitaker. However, I kept him where I rank TLD villains combined. But I would rank Whitaker as more the main villain of the two.