I'm not Al, but...
Davey Johnson the player is a definite no
Davey Johnson the manager is a tough call. He took 3 out of 4 teams he managed to the playoffs and won a WS, but, aside from the Mets stint (6.5 years), his tenures were very short (3 in Cincy, 2 each in Baltimore and LA), supposedly because he even makes Bill Parcells look hospitable.
Another thing I just noticed was that during his Mets tenure they finished 2nd in the East every year they didn't go to the postseason, which means he kept them as perenial contenders, even though it would be hard not to with that lineup (HoF catcher, possible HoF 1st baseman, eventual NL MVP, the best young hitter of the time and the best young pitcher of the time)