#2 Ric Flair

"The Nature Boy" Ric Flair is considered by many to be the greatest ever to have ever laced a pair of wrestling boots. Flair may have been a 16-time World Champion, but his run as WWE Champion included only two stints.
The WWE Hall of Famer held the WWE Championship for a total of 118 days. Most of his title reigns pre-dated the WWE, wherein he was more of a veteran sidekick as part of the Evolution and didn't enjoy many successful stints as a champion, hence explaining his rather short combined title reign.
Although a comparison in terms of wrestling abilities cannot be made between Jinder Mahal and Flair, the former had a longer stint than the legend as a WWE Champion.
Becky Lynch has been challenged HERE.