#2 UFC middleweight champion Israel Adesanya

The only fighter on this list to have already taken a crack at being a two-division champion, Israel Adesanya suffered his first professional loss to Jan Blachowicz at UFC 259.
'The Last Stylebender' decided to enter the fight with a lean figure, resulting in him being pinned to the mat for a significant portion of the five rounds. Adesanya has since moved back to middleweight and defended his title against Marvin Vettori, but has been vocal about his intent to return to 205 lbs and compete for the title once again.
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Adesanya, who is improving rapidly by the day, might consider a different approach for his second quest at light heavyweight. And only a fool would bet against him using his unparalleled kickboxing to become a two-division UFC champion.
#1 Former UFC light heavyweight champion Jon Jones

Jon Jones' move to heavyweight, which has been teased for years, is still treated with a dollop of salt.
'Bones' has continually expressed an interest in fighting the best at heavyweight, but a pay dispute with the UFC and a self-confessed need to take his time during the transition have kept him on the sidelines for almost two years now.
Jones has stated that he'll return to the UFC in 2022, when he will look to become a two-division champion.
Can Jon Jones be Jon Jones at heavyweight? His last two performances have been lackluster; he will be up against absolute killers; he hasn't stepped foot in the octagon in a minute. But it would be impossible to bet against one of the greatest of all time.