I saw this topic in the ORG, and thought it was a good one. I was born in '77, so I didn't really get to see Bench play much.
Anyway, I'm going to list the top 3 at each position I've seen in my lifetime in order.
C--Pudge, Carter, Mauer
IB-Teixeira, Helton, Votto
2B-Phillips, Alomar, Biggio
SS-Smith, Larkin, Vizquel
3B-Schmidt, Rolen, Chavez
OF-Griffey, Evans, Ichiro