He did not say no one. He said they do not make good teammates because they are more concerned w homeruns than helping the team by not striking
You picked a great example in Rob Deer. Very similar to Dunn in that he also walked a lot but his career average was 220 ish. Good outfielder though w a great arm. Just don't look up his post season stats. Pretty sure his teams never made the playoffs despite his home run numbers.