Putting specific sports to one side, I'd have to say in terms of raw and demonstrated athletic/sporting ability: those of African descent.
This is a very broad brushstroke, I admit, but you can't compare baseball to hockey in terms of the athletic ability of its players. It's like comparing apples and oranges. Or, as'Bad MuthaFucka' Jules said in Pulp Fiction :
"(it) ain't the same fucking ball park. It ain't the same league. It ain't even the same fucking sport."
Let's look at those that most excel at the sports listed above.
By and large, they ain't gingery haired Irish guys ......
Google Carolina Kluft.