Taka, better known as Scar, was the main antagonist of The Lion King and the second season of The Lion Guard and a minor antagonist in The Lion King II: Simba's Pride and The Lion King 1½. He was Simba's arch-nemesis and paternal uncle, Mufasa's arch-rival and younger brother, Shenzi, Banzai and Ed and the hyenas' former leader and boss, and Zira's superior.
The Lion King
The Lion King II: Simba's Pride
The Lion King 1½
Hercules (cameo) The Lion Guard: Return of the Roar The Lion King (2019) (upcoming)