I would pick Zoilo ("Zorro") Versalles as best shortstop in Twins history. https://en.wikipedia.org/wiki/Zoilo_Versalles
Zorro's defense was inconsistent, but his other contributions made him league MVP in 1965.
Lewis is making baseball history.
Some may say small sample size, but the playoffs will also be SSS.
With the Twins pitching and defense, if the bats are hot going into the playoffs this could be the year.