I chose Ali, Jordan and Ruth for sports like most of you, but I really wanted to fit Wayne Gretzky in there. I still believe he has the best nickname, "The Great One".
I wonder who chose 'other' for that category and who were they thinking of?
Maybe the 'other' in that category is for the race horse Secretariat.

I had the same problem as you Bibble in regards to Ali vs. Gretzky.
I went with Gretzky, Ruth and Jordan ( not specifically in that order). Ali would have been my next pick as he was very close in my decision.
Actors/Actresses : Hepburn, Hoffman and Other. The other for me is Spencer Tracy.
Entertainers : Elvis, Sinatra and The Beatles.
While I am not a huge Beatles fan, and am more of a fan of several others on the list, I do feel that the Beatles are one of the greatest in that category and deserved my vote.
As a matter of fact that is really how I picked out of all the categories above. I did not neccesarily pick names that may be my favorites, but I picked names of those who I feel deserve to be categorized amongst the greatest in their respective fields.