I don’t think any of us within the confines of our human minds could actually come up with who is the JEW of the decade. It is probably someone who has done incredible acts of mesiras nefesh that none of us, only Hashem, knows about.
That being said, I think it would be an impossible award to give out. YIDDEN? Each one of us is a part of a whole….we’re so different and unique and special compared to the rest of the world, it’s just not shayoch to even comprehend because we’re all so interconnected, and work together in such special ways, no matter how different and divided we are.