That’s been my question also. If it’s not unanimous did the Holy Spirit tell some different than others? Rather inconsistent of the Holy Spirit it seems.
You may be --- without meaning to --- narrowing down the Holy Spirit's options on this. There's no need to think He's limited to choosing only one, rather than allowing a choice among several good options.
I would hope that all the also-rans were also worthy men, any one of whom could have made a good pope.
Like most--- not all, but most --- matters which depend on human freedom (the choice of a college, of a major, of a spouse, of a job) God gives us a number of "goods" among which we are free to choose. I
Often it's a selectin process dealing with a set of rather evenly matched goods. The Holy Spirit permits this range. It's not always a contest between good and evil.