There are also quirky players that have good HR numbers when normalized IF they are in the right stadium (which can cut both ways - so watch your pitching staff's HR/9 numbers):
Dick Stuart - one year is great, another looks great but check the performance history, I forget which is which between '61 and 63
and two players I never see mentioned in the forums:
Reggie Jackson has NEVER underperformed for my teams (in OLs that is, using a number of different seasonal iterations: he is doing lousy on a prog team right now for me)
And my money for the best hitter in the whole SIM that is reasonably affordable - outperforming Ruth '29 on at least one team that had them both, is Hal Trosky '36.
Also, while Willie Mays is known to be an underperforming player put him in Fenway Park or Coors and he lights up.
Oh, and of course there is HoJo as part of a balanced attack heavy on the HRs. It is true, though, that I have never won a championship using this strategy, but have gotten HR based teams in the playoffs several times. So it is possible and I am not that good at this, so someone who knows what they are doing can do better, I am sure.