The most brilliant storyline in WWE history is the Randy Savage-Hulk Hogan saga, which built for about a year-and-a-half before its climax at WrestleMania 5 and continued on and off for another year after that.
It started in the fall of 1987, when Savage turned babyface by virtue of feuding with the then-intercontinental champion, the Honky Tonk Man. When the Hart Foundation joined Honky Tonk Man in attacking Savage, though, he had no friends in the locker room. Manager Miss Elizabeth had to run to the back and drag Hulk Hogan to the ring to get him to make the save. After briefly teasing that they'd fight, Hogan and Savage shook hands, leading to them forming the Mega Powers tag team.
Throughout 1988, they teamed on major shows, but Savage was getting increasingly jealous of what he perceived as flirting between Hogan and Elizabeth. In early 1989, when Savage was thrown into Elizabeth during a Mega Powers match against the Twin Towers (Big Bossman and Akeem), Hogan abandoned the match to tend to her in the makeshift hospital room backstage. He came back to help win the match, but the pressure cooker of emotions exploded, and he got attacked by Savage, who also threatened Elizabeth.
It all led to WrestleMania 5, which set pay-per-view records that weren't eclipsed for a long, long time. With Elizabeth in a neutral corner, Hogan won the WWF Championship from Savage in probably his second best WrestleMania match after his miracle with Warrior. While they had better matches together, none of them was on this big a stage with this kind of story and drama.
While all traces of the match have been scrubbed from YouTube, WWE Network subscribers can watch it here.