#5 Kane
Kane's days of being considered a credible threat to champions have long since past.
His last World Title reign was back in 2010 when he immediately cashed in his MITB briefcase on Rey Mysterio at Money in the Bank.
It was the first time a wrestler had won and cashed in the briefcase on the same night.
Ever since then, Kane has been a challenger whenever most of the other options have been exhausted.
He's also been a challenger when one of the bigger wrestlers on the roster need a physically large obstacle to help 'legitimize' their standing as champion.
Reigns, Rollins, Bryan, Cena and Lesnar have all brushed back Kane's challenges when they were all holding gold.
Kane just isn't a believable threat to anyone nowadays, save for maybe someone like Drake Maverick.
Kane was one of Lesnar's meals when he challenged for the Universal Championship on two occasions.
The first was at a live event in December of 2017.
The other match was when he and Braun Strowman challenged Lesnar in a Triple Threat match at last year's Royal Rumble.
Since Lesnar was the part-time champion and Strowman was being built as a potential future champion, Kane's involvement in the match was apparent.
He was there to take the pin to help the other participants remain strong.
Like the Big Show, Kane has been in the role of putting over younger stars and champions.
He's been a loyal employee for the WWE for his entire career and is fine with doing the job for other superstars.
He's even become the mayor of Knox County, Tennessee.
Because of those obligations, is easier to understand his being fed to Brock more so than other full-time superstars.
He's a part-timer now, but part-timers can still be on the menu for Brock.