There were absolutely loads of villains in the James Bond films
so I will only provide you with the most notorious of the villains.
Ernst Stavro Blofeld who was the head of the secret terrorist
organisation known as S.P.E.C.T.R.E. Out of all the Bond villains
Blofled is probably considered the most evil of them all. Some of
the characteristics of this criminal mastermind are his brilliant
criminal mind, his ruthlessness, and his snobbishness. He appeared
in the James Bond films; From Russia With Love (1963), Thunderball
(1965), You Only Live Twice (1967), On Her Majesty's Secret Service
(1969), Diamonds Are Forever (1971), and then in For Your Eyes Only
(1981). Meaning that Ernst Stavro Blofeld is the most notorious of
all the villains.