I can't say I know too much about him other than that he had the reputation as the greatest fighter of all time. However, one thing stood out to me. The phrase "Ali Bomaye" which meant "Ali kill him" which was what the crowd chanted, from what I've read, when he fought George Foreman in The Rumble in the Jungle in Kinshasa. The only reason how I really know all about this was that Japanese wrestler Shinsuke Nakamura (former New Japan Pro Wrestling star, now is in WWE) named his finisher Bomaye which is this devastating knee-strike to the face.
Nakamura used to be under something called "Inoki-Ism" which is the mentality that NJPW founder Antonio Inoki had to enforce that his style of fighting (which he pushes on his NJPW guys back then) was the best of all fighting (hence, NJPW's tag-name is the King of Sports). Inoki faced Ali in Japan in 1976 in something that was poorly received for both guys. I believe Nakamura named his move Bomaye to spite Inoki (since the guy did literally send someone to the ring and beat the living crap out of Nakamura and Inoki for all the good he did for NJPW, sent the company in a huge downward spiral in the mid-2000s, forcing him to leave the company.)
Anywho, R.I.P Ali.