Most underrated 3rd baseman?

There's a nice write-up in the New York Time today about Beltre

But what truly distinguishes Beltre, what makes him perhaps the most underappreciated performer in baseball, is the way he plays third base. It is not only that Beltre, a three-time Gold Glove winner, is the best in the majors at the position. It is that he plays it with a style that defies logic, and he uses a blend of skill, strength, intellect and instinct that is all his own.