One of the more interesting characters of the game, David "Boomer" Wells, played 21 seasons in the Majors for nine different teams, three of which he had two stints.  Wells longevity allowed him to amass a record of 239-157 with 2,201 Strikeouts, but don't view him as a "compiler."

In terms of actual importance in Baseball, Curt Flood is in the top ten, if not top five in the game.

The story of Howard Ellsworth "Smoky Joe" Wood is typical in that and we have a power pitcher who was dominant for a short time, only for arm fatigue to cause an early end of his pitching career (though he would continue to play, but we'll get to that later.)

Ted Kluszewski was a monster in his day.  This was not just in regards to his tape measure Home Runs, but that he was such an imposing physical specimen that he cut off the sleeves of his uniform so that his arms could better move.