Dumars wasn't a top defender at his position though he had an A offense. Artest didn't have a serious offensive impact even in his prime in Indy. Did you know Iggy was a top defender before last year finals? I didn't...Kawhi is called "two way" just because his offense isn't good enough to call it a top level compared to Durant or Lebron though he is a major offensive option in the NBA second best team, but his defense is on the top level compared to anyone in the league now.
Kawhi dominates defensively on small forward position having a very efficient offensive arsenal. Last one who did that was Pip. Artest, Prince, Bowen, Battier, Iggy, Johnson, Frazier are just from another league.