A true 80 hitter has bat to ball skills, puts the ball in play consistently with authority, and doesn't strike out. The barrel stays in the hitting zone for such a long time they can make solid contact even when they're fooled.
They should be competing for batting titles on a regular basis. More credit to someone who can make contact with authority as opposed to slapping the ball into play. An 80 hitter's vintage seasons will often have more home runs than strikeouts.
To me, Joe Dimaggio is the prototypical 80 hit guy. Gwynn, Williams, and Boggs all up there. Edgar Martinez is a step below that, but has a similar profile. A lot of current guys are fooled way too often to be considered an 80 hit.