I suppose it comes down to how we measure the question, because the most famous cricket players are going to be known by less than 1% of Americans, while the most famous soccer players are going to be much higher.
Not really, its well defined.
A better thread title would be the most famous person worldwide that isn't famous in America or a sportsman IMO.
I think Messi/Ronaldo/etc. would be a better fit than Tendulkar, because soccer has far more universal appeal than cricket.
Looks like you haven't read the thread. We have already eliminated Ronaldo and Messi, since they are too well known.
Anyway OP defines it as:
Basically, who is a celebrity or public figure who is incredibly well known through most of the world but not the US?
Cricket players are never known in "most of the world", so they are out by definition. The same goes for Asian, African, Latin American and European actors and singers.
As previously stated I cant see there is any other possibility than a soccer player ranking just under Messi/Ronaldo in fame.
Soccer is the only field that almost everybody outside the US follows and relatively few Americans do.