Clayton from Tarzan: This guy was awful. We all get that. That may be why we don't think twice about his insanely violent death. While trying to stab Tarzan and apparently every Gorilla in the jungle as well, Clayton gets tangled up in a bunch of vines. He tries to free himself by cutting away at the vines, forgetting to cut the one that's AROUND HIS FREAKING NECK. He falls a great distance and is straight up hanged. Then, when lightning strikes, all of us kids watched the shadow of his lifeless body swaying in the air. Don't remember? Check the video.
Scar from the Lion King: When Scar is finally defeated, Simba has no more time to put up with his s*it. He literally could not hate Scar more than he does at the moment when he learns that he killed his father. He leaves him at the mercy of his hyena "friends" who are so hungry from Scar's terrible rule over the land that they EAT HIM ALIVE.
Ursula from the Little Mermaid: Ursula goes bananas when she doesn't win her "bet" with Ariel and decides to rise up out of the ocean and attach Eric's ship with Triton's...triton. Eric steers the ship right into her abdomen and IMPALES her with it. Then, for dramatic effect, she is electrocuted- struck by lightning- and suddenly octopi have bones? You can see her whole skeleton while she screeches in pain.
Mufasa from the Lion King, too: Everyone was terrified at this part of the film- The lion king's own brother (very shakespeare...) throws him off the edge of a rock cliff where he is trampled to death. TRAMPLED TO DEATH. This is why I avoid black friday sales- I fear for my life. Then, almost immediately, we forget that we just watched a scene of animal carnage and sing along to "Hakuna Matata".