Even Hulk Hogan’s first title reign, which was ongoing as the WrestleMania era started, only saw him defend the title successfully at two WrestleManias.

Source: https://prowrestling.net/site/2023/04/04/pruetts-pause-wwe-wrestlemania-39-the-contrasting-emotional-journeys-of-roman-reigns-vs-cody-rhodes-and-the-usos-vs-sami-zayn-and-kevin-owens/

Pete Rose worked several WrestleManias getting beaten up by Kane (who's nickname was THe Big Red Machine, like Rose's Reds teams).

Source: https://www.fark.com/comments/12820874?utm_source=feed&utm_medium=comments&utm_campaign=fark

Rey & Eddie got to open up WrestleMania 21, which ended up being one of the most memorable WrestleManias of the era.

Source: https://411mania.com/wrestling/top-10-wrestlemania-opening-matches/